Rheedea
type: channel
description: Founded in 1991 and published by the Indian Association for Angiosperm Taxonomy (IAAT), Rheedea is an international peer-reviewed journal with four online and two print issues per year. The online issues will be published in March, June, September and December while the printed issues will be published in June and December. Rheedea is a peer-reviewed journal named after the renowned Dutch botanist Hendrik van Rheede, known for his seminal work Hortus Malabaricus. ISSN: 2582-2438 (Online edition) ISSN: 0971-2313 (Print edition)
publisher: Journal of the Indian Association for Angiosperm Taxonomy
language: en
publication name: Rheedea
issn: 0971-2313
items: Hyphaene dichotoma (Arecaceae): an addition to floristic diversity of eastern India
items: Homalomena randii, a new species of Araceae from West Kalimantan, Borneo
items: Lectotypification of three names and a new synonymy in Alseodaphne (Lauraceae) of India
items: A conspectus of the genus Ipomoea (Convolvulaceae) in India
items: The Taxonomic updates on Parsonsia (Apocynaceae) from Vietnam: a new record and lectotypification
items: First documented reports of the Australian Atriplex suberecta (Amaranthaceae s.l., Chenopodioideae) from Tunisia, a well-established weed in North Africa
items: Notes on Isachne veldkampii (Poaceae) and reduction of I. bhatii as conspecific
items: The Pioneering Works of Carl Linnaeus (1707-1778)
items: Studies on Reproductive aspects of Willisia selaginoides (Podostemaceae), an endemic species from Kerala
items: Evolution of macro and micromorphology of Eriocaulon (Eriocaulaceae) and its relation with the aquatic environment
items: A synopsis of genus Ammannia L. (Lythraceae) in India
items: Structural Diversity of Flowers and Pollination Ecology in Podostemaceae
items: Heteranthera reniformis (Pontederiaceae): A new addition to the Asian continent from India
items: Taxonomic revision of genus Potamogeton (Potamogetonaceae) in Kashmir Himalaya, India
items: The status and conservation of Malabar River-lily (Crinum malabaricum) (Liliopsida: Amaryllidaceae)
items: Microecology and floristic diversity of seasonal wetlands of a lateritic plateau of South India
items: Neotypification of the name Diplomeris pulchella (Orchidaceae)
items: Typification of Candollean names in the tribe Gnaphalieae (Asteraceae)
items: Taxonomic reassessment of Impatiens verecunda (Balsaminaceae) and its synonymization with I. cordata in the Western Ghats, India
items: Physalis cordata (Solanaceae): a new record for India
items: A taxonomic revision of the genus Justicia (Acanthaceae) in Peninsular India
items: Peter Hamilton Raven (1936–2026): A Global Architect of Biodiversity Conservation and a Friend to Indian Botany
items: Dr. Amarjit Singh Soodan: A Renowned Botanist, Taxonomist and A Mentor
items: Iconic Trees of India
items: Note on taxonomy and typification of Vigna hainiana Babu, Gopinathan & Sharma ( =Phaseolus wightii W. & A.)
items: Book Review: Know Your Grass Genera Through Hand Lens
items: The Genus Ludwigia (Onagraceae) in India
items: Solanum cordatum (Solanaceae) – A new record to Southern India
items: Syzygium claviflorum (Myrtaceae) – A new record for South India
items: Rediscovery of Pogostemon nilagiricus (Lamiaceae), a steno-endemic and critically endangered aromatic species

Hyphaene dichotoma (Arecaceae): an addition to floristic diversity of eastern India
type: item
description: Section: New Reports Keywords: Botanical exploration, Branching palm, Coastal ecology, Dichotomous,, Palmyra palm Hyphaene dichotoma (D.White bis ex Nimmo) Furtado (Arecaceae) is reported here as an addition to floristic diversity of eastern India, based on collections from forest of Bankura district, West Bengal. This species has previously been reported from Diu, Goa, Gujrat and Maharashtra. This study aims for a detailed description along with photographs and geographical latitudinal and longitudinal data that supports the addition to the flora of the Bankura district, West Bengal, India.
subject: New Reports
  topic: section
subject: Botanical exploration
  topic: keywords
subject: Branching palm
  topic: keywords
subject: Coastal ecology
  topic: keywords
subject: Dichotomous,
  topic: keywords
subject: Palmyra palm
  topic: keywords
creator: Roni Saha
creator: Rahul Deb Barman
creator: Subrata Chowdhury
creator: Devendra Singh
creator: Amal Kumar Mondal
rights: Copyright (c) 2026 Rheedea https://creativecommons.org/licenses/by-nc-nd/4.0
date: 2026-06-30
publication date: 2026-06-30
starting page: e1192
ending page: e1192
doi: 10.22244/rheedea.36.1192

Homalomena randii, a new species of Araceae from West Kalimantan, Borneo
type: item
description: Section: New Taxa Subjects: Araceae, Hanneae Complex, Malesia, Philodendreae, Sambas Homalomena randii is described and illustrated here as a new species of Araceae from West Kalimantan, Indonesia. The new species is assigned to the Cyrtocladon Supergroup based on a combination of morphological characters, including typically hastate leaf blades with pronounced posterior lobes; staminate flowers consisting of (3–)4(–5) truncate stamens, each surmounted by a large, flat, cream-colored connective; and the presence of conspicuous resin droplets secreted between the staminate flowers. This discovery underscores the strong potential for further discoveries of Homalomena species in underexplored regions of Indonesian Borneo, highlighting the continuing importance of botanical exploration in the area.
subject: New Taxa
  topic: section
subject: Araceae
  topic: subjects
subject: Hanneae Complex
  topic: subjects
subject: Malesia
  topic: subjects
subject: Philodendreae
  topic: subjects
subject: Sambas
  topic: subjects
creator: Arifin Surya Dwipa Irsyam
creator: Muhammad Hariri
rights: Copyright (c) 2026 Rheedea https://creativecommons.org/licenses/by-nc-nd/4.0
date: 2026-06-30
publication date: 2026-06-30
starting page: e1203
ending page: e1203
doi: 10.22244/rheedea.36.1203

Lectotypification of three names and a new synonymy in Alseodaphne (Lauraceae) of India
type: item
description: Section: Typification/Combinations Subjects: Typification, Isolectotype, Peninsular India, Syntype Lectotypes are designated here for Alseodaphne semecarpifolia Nees var. angustifolia Meisn., A. semecarpifolia Nees var. macrocarpa Hook.f. and A. semecarpifolia Nees var. parvifolia Wight ex Hook.f. based on critical examination of the protologues and original materials. A. semecarpifolia Nees var. macrocarpa is reduced to the synonymy of Alseodaphne semecarpifolia Nees var. angustifolia, as the diagnostic characters used to distinguish the former fall within the morphological variation observed in the latter.
subject: Typification/Combinations
  topic: section
subject: Typification
  topic: subjects
subject: Isolectotype
  topic: subjects
subject: Peninsular India
  topic: subjects
subject: Syntype
  topic: subjects
creator: S. Karthika
creator: Robi Jose
creator: Udayan P.S.
rights: Copyright (c) 2026 Rheedea https://creativecommons.org/licenses/by-nc-nd/4.0
date: 2026-06-30
publication date: 2026-06-30
starting page: e1202
ending page: e1202
doi: 10.22244/rheedea.36.1202

A conspectus of the genus Ipomoea (Convolvulaceae) in India
type: item
description: Section: Monographs/Revisions Keywords: Diversity, Morning glory, Tropical Asia, Moon flowers Subjects: Taxonomy, Conspectus, Convolvulaceae, India The family Convolvulaceae are one of the dominant families of flowering plants in India, and the genus Ipomoea L. is the largest and most diverse within it, both globally and in India. Ipomoea displays remarkable diversity in shape, size, and flower colour, making it a subject of interest for horticulturists, naturalists, and researchers worldwide. A comprehensive account of Ipomoea in India was prepared using data collected through extensive field surveys across diverse phytogeographical regions since June 2013. The present study documents 52 taxa (51 species and one infraspecific taxon) of Ipomoea in India. A key for the identification of species is provided. For each species, detailed morphological descriptions, illustrations and notes on habitat, distribution, diagnostic characters and present status are provided. The occurrence of Ipomoea lacunosa L. and Ipomoea vagans Baker in India is also discussed.
subject: Monographs/Revisions
  topic: section
subject: Diversity
  topic: keywords
subject: Morning glory
  topic: keywords
subject: Tropical Asia
  topic: keywords
subject: Moon flowers
  topic: keywords
subject: Taxonomy
  topic: subjects
subject: Conspectus
  topic: subjects
subject: Convolvulaceae
  topic: subjects
subject: India
  topic: subjects
creator: A.V. Kattee
creator: C.R. Patil
creator: V.B. Shimpale
rights: Copyright (c) 2026 Rheedea https://creativecommons.org/licenses/by-nc-nd/4.0
date: 2026-06-30
publication date: 2026-06-30
starting page: e1194
ending page: e1194
doi: 10.22244/rheedea.36.1194

The Taxonomic updates on Parsonsia (Apocynaceae) from Vietnam: a new record and lectotypification
type: item
description: Section: Articles Keywords: Gentianales, Kim Hy, Plant diversity, Taxonomy, Thai Nguyen Subjects: Parsonsia, Apocynaceae, New Report Parsonsia goniostemon Hand.-Mazz., previously known only from China, is newly recorded for the flora of Vietnam based on specimens collected from Kim Hy Nature Reserve in Thai Nguyen Province. This species is morphologically allied to P. alboflavescens (Dennst.) Mabb. but can be distinguished by its shorter petioles and stamens inserted at the corolla throat. A detailed description, photographic illustrations, and comparisons with the morphologically allied species are provided. Notes on its habitat, ecology, distribution, and provisional conservation status in Vietnam are also included. In addition, a lectotype is designated for the name P. goniostemon to stabilize its nomenclature.
subject: Articles
  topic: section
subject: Gentianales, Kim Hy, Plant diversity, Taxonomy, Thai Nguyen
  topic: keywords
subject: Parsonsia
  topic: subjects
subject: Apocynaceae
  topic: subjects
subject: New Report
  topic: subjects
creator: T.T. Nguyen
creator: T.B Tran
creator: H.Q. Bui
creator: D.B. Tran
creator: Le Ngoc Han
creator: Ritesh Kumar Choudhary
creator: V.H. Do
rights: Copyright (c) 2026 Rheedea https://creativecommons.org/licenses/by-nc-nd/4.0
date: 2026-06-30
publication date: 2026-06-30
starting page: e1224
ending page: e1224
doi: 10.22244/rheedea.36.1224

First documented reports of the Australian Atriplex suberecta (Amaranthaceae s.l., Chenopodioideae) from Tunisia, a well-established weed in North Africa
type: item
description: Section: New Reports Keywords: Alien Atriplex, Chorology, New records, Xenophytes Subjects: Alien Atriplex, New records, North Africa, Tunisia, Xenophytes Atriplex suberecta I.Verd. (Amaranthaceae s.l., Chenopodioideae) is native to southern Australia and alien but naturalized in warm temperate and subtropical regions of the world. In North Africa, the plant has been long established in Morocco, with recent findings in Algeria. Here we report numerous documented findings of A. suberecta from the Mediterranean part of the country, with a detailed morphological description, ecological characteristics, and composition of the alien Atriplex in Tunisia.
subject: New Reports
  topic: section
subject: Alien Atriplex
  topic: keywords
subject: Chorology
  topic: keywords
subject: New records
  topic: keywords
subject: Xenophytes
  topic: keywords
subject: Alien Atriplex
  topic: subjects
subject: New records
  topic: subjects
subject: North Africa
  topic: subjects
subject: Tunisia
  topic: subjects
subject: Xenophytes
  topic: subjects
creator: Ridha El Mokni
creator: Alexander P. Sukhorukov
rights: Copyright (c) 2026 Rheedea https://creativecommons.org/licenses/by-nc-nd/4.0
date: 2026-06-30
publication date: 2026-06-30
starting page: e1214
ending page: e1214
doi: 10.22244/rheedea.36.1214

Notes on Isachne veldkampii (Poaceae) and reduction of I. bhatii as conspecific
type: item
description: Section: Articles Keywords: Endemism, Grass, Isachne veldkampii, South India, Synonym, Variations. Subjects: Endemism, Grass, Isachne veldkampii, South India, Synonym, Variations. The recently described species Isachne bhatii P.Biju, Josekutty & Augustine is treated as conspecific to I. veldkampii K.G.Bhat & Nagendran. A detailed description, notes on habitat, distribution, conservation status, and photographs are provided. Although the species was previously considered Critically Endangered, the present study reveals a broader distribution than was previously documented.
subject: Articles
  topic: section
subject: Endemism, Grass, Isachne veldkampii, South India, Synonym, Variations.
  topic: keywords
subject: Endemism, Grass, Isachne veldkampii, South India, Synonym, Variations.
  topic: subjects
creator: HARITHA P. BHARATHAN
creator: Pramod C.
rights: Copyright (c) 2026 Rheedea https://creativecommons.org/licenses/by-nc-nd/4.0
date: 2026-06-30
publication date: 2026-06-30
starting page: e1207
ending page: e1207
doi: 10.22244/rheedea.36.1207

The Pioneering Works of Carl Linnaeus (1707-1778)
type: item
description: Section: Biography Keywords: Test The multi-faceted contributions of Linnaeus are briefly reviewed. From the early times as a student when his original ideas on plants and their sexuality blossomed to artificially classify for ease to identify, understand and to refine, as interactions with great men of science of the day continued, crystallizing the concepts and putting across for wide appreciation, Linnaeus impeccably edited his thoughts, as nobody could make it. His concepts on species, genera and classification of the world flora were uniquely original, which helped the later generations to work on and perfect it.
subject: Biography
  topic: section
subject: Test
  topic: keywords
creator: C. Sathish Kumar
rights: Copyright (c) 2026 Rheedea https://creativecommons.org/licenses/by-nc-nd/4.0
date: 2026-06-30
publication date: 2026-06-30
starting page: e1259
ending page: e1259
doi: 10.22244/rheedea.36.1259

Studies on Reproductive aspects of Willisia selaginoides (Podostemaceae), an endemic species from Kerala
type: item
description: Section: Articles Keywords: Endemic, germination, Podostemoideae, self-pollination, thallus The present study deals with some aspects of reproductive biology of an endemic and endangered aquatic angiosperm, Willisia selaginoides (Bedd.) Warm. ex Willis (Podostemaceae) restricted to the Western Ghats of India. Due to its occurrence in the challenging habitats, there is limited information available on its reproductive biology. Willisia possesses a small tuft of shoots with triangular thick scales and terminal flowers. The horizontal thallus arising after seed germination is considered as primary shoot and the vertical shoots arising on the dorsal surface of the thallus are considered as secondary shoots. The gummy substance exudes from the lower elongated surface cells (rhizoids) of the shoots and holdfast help in firm attachment to the shoots to rocks in fast flowing water. The flower is enclosed in spathella and represented by a pistil with bilobed stigma and a pair of dithecous anthers. Initiation of flower buds and subsequent development occurs in submerged conditions but flowers open only after the water level lowers down after monsoon. Pollination occurs when the flowers are just exposed to air after lowering of water level at the air-water interface. Co-occurrence of stigma receptivity with anther dehiscence and the close proximity of two organs seem to promote self -pollination. The pollen:ovule ratio (32:1) and ovule:seed ratio (6:5) suggest that even after relatively low pollen:ovule ratio, chances of high seed set occur. It clearly indicates the best possibility of selfpollination.
subject: Articles
  topic: section
subject: Endemic
  topic: keywords
subject: germination
  topic: keywords
subject: Podostemoideae
  topic: keywords
subject: self-pollination
  topic: keywords
subject: thallus
  topic: keywords
creator: M. Leleeka Devi
creator: P. L. Uniyal
creator: N. Mann
creator: P. Kumari
creator: Sanavar
rights: Copyright (c) 2026 Rheedea https://creativecommons.org/licenses/by-nc-nd/4.0
date: 2025-12-31
publication date: 2025-12-31
starting page: 185
ending page: 194
doi: 10.22244/rheedea.2025.35.04.02

Evolution of macro and micromorphology of Eriocaulon (Eriocaulaceae) and its relation with the aquatic environment
type: item
description: Section: Articles Keywords: Poales, Pipeworts, Taxonomy, Anatomy, Aquatic habitat, Evolution Eriocaulon L. is a pantropical genus comprising approximately 495 species. Previous taxonomic studies have proposed infrageneric classifications based on selected morphological characters; however, molecular phylogenetic analyses have shown that most of these classifications are paraphyletic. A recent multivariate analysis of anatomical data identified two major groups within the genus: one composed of amphibious species and the other of aquatic species. In this context, the present study aims to test the hypothesis that these groups correspond to distinct evolutionary clades by conducting a cladistic analysis of Eriocaulon based on morphological data. Our analysis included 65 species of Eriocaulon and seven outgroup species, using a dataset of 89 macro- and micromorphological characters. Parsimony analyses conducted in TNT recovered 24 equally parsimonious trees. In all analyses, Eriocaulon was resolved into two main clades. One clade comprises amphibious species from Africa and the Americas and shares plesiomorphic character states with Mesanthemum Körn., including palisade epidermal cells, stomatal chambers, and numerous vascular bundles in the leaf. The other clade, comprising aquatic species distributed across all continents, is characterized by derived character states, including a reduced number of vascular bundles, isodiametric epidermal cells, and the loss of stomatal chambers. These results suggest that the evolutionary history of Eriocaulon is closely tied to anatomical adaptations that facilitate colonization of aquatic environments.
subject: Articles
  topic: section
subject: Poales
  topic: keywords
subject: Pipeworts
  topic: keywords
subject: Taxonomy
  topic: keywords
subject: Anatomy
  topic: keywords
subject: Aquatic habitat
  topic: keywords
subject: Evolution
  topic: keywords
creator: A. L. R Oliveira
creator: P. C. Baleeiro
creator: A. M. Darshetkar
creator: R. K. Choudhary
rights: Copyright (c) 2026 Rheedea https://creativecommons.org/licenses/by-nc-nd/4.0
date: 2025-12-31
publication date: 2025-12-31
starting page: 195
ending page: 215
doi: 10.22244/rheedea.2025.35.04.03

A synopsis of genus Ammannia L. (Lythraceae) in India
type: item
description: Section: Articles Keywords: Ammannia, macrophyte, Myrtales, India, taxonomy The genus Ammannia L. (Lythraceae) in India is revised and a taxonomic synopsis is presented. In this study, nine species are recognized. Ammania nagpurensis T.Mathew and M.P.Nayar have been synonymized under A. multiflora. A key to the species, along with brief descriptions, phenology, habitat preference, distribution, and conservation status are provided. Additionally, detailed taxonomic and nomenclatural notes are presented to aid in species identification and to reconcile ambiguities in taxonomic treatments.
subject: Articles
  topic: section
subject: Ammannia
  topic: keywords
subject: macrophyte
  topic: keywords
subject: Myrtales
  topic: keywords
subject: India
  topic: keywords
subject: taxonomy
  topic: keywords
creator: Arun Prasanth
creator: M. M. Sardesai
rights: Copyright (c) 2026 Rheedea https://creativecommons.org/licenses/by-nc-nd/4.0
date: 2025-12-31
publication date: 2025-12-31
starting page: 232
ending page: 254
doi: 10.22244/rheedea.2025.35.04.05

Structural Diversity of Flowers and Pollination Ecology in Podostemaceae
type: item
description: Section: Articles Keywords: Aquatic angiosperms, evolution, floral biology, perianth, spathella, pollination diversity Podostemaceae, or “river-weeds,” are a diverse family of freshwater angiosperms adapted to fast-flowing tropical and subtropical rivers. With over 300 species, they exhibit remarkable morphological variation across regions, especially between New World and Old-World taxa. Their life-cycle is tightly synchronized with seasonal water levels, with flowering and seed production occurring as waters recede. These plants rely solely on sexual reproduction, making pollination a key evolutionary driver for diversification. Different pollination strategies, melittophily, anemophily, and self-pollination have been reported within the family. However, integration of floral morphology and pollination biology remains limited. Thus, an overview of reproductive characters in Podostemaceae is presented, focussing on characters that are useful in understanding the pollination strategies and functional floral morphology in the family. This review synthesizes current knowledge to explore how pollination systems and floral traits have shaped the evolutionary trajectory of Podostemaceae.
subject: Articles
  topic: section
subject: Aquatic angiosperms
  topic: keywords
subject: evolution
  topic: keywords
subject: floral biology
  topic: keywords
subject: perianth
  topic: keywords
subject: spathella
  topic: keywords
subject: pollination diversity
  topic: keywords
creator: P. Khanduri
creator: P. L. Uniyal
creator: S. K. Roy
creator: R. Tandon
rights: Copyright (c) 2026 Rheedea https://creativecommons.org/licenses/by-nc-nd/4.0
date: 2025-12-31
publication date: 2025-12-31
starting page: 216
ending page: 231
doi: 10.22244/rheedea.2025.35.04.04

Heteranthera reniformis (Pontederiaceae): A new addition to the Asian continent from India
type: item
description: Section: New Reports Keywords: Heteranthera reniformis, new addition, India, Asia Heteranthera reniformis (Pontederiaceae) is recently collected from the Vyenkatapur village, Sironcha taluka, Gadchiroli district, Maharashtra. It is reported here as a new record for the continent of Asia. A comprehensive taxonomic account is provided with description, photographs and distribution to facilitate easy identification of the species in the field.
subject: New Reports
  topic: section
subject: Heteranthera reniformis
  topic: keywords
subject: new addition
  topic: keywords
subject: India
  topic: keywords
subject: Asia
  topic: keywords
creator: V. I. Kahalkar
creator: P. V. Pate
creator: A. Meena
creator: R. S. Govekar
rights: Copyright (c) 2026 Rheedea https://creativecommons.org/licenses/by-nc-nd/4.0
date: 2025-12-31
publication date: 2025-12-31
starting page: 255
ending page: 257
doi: 10.22244/rheedea.2025.35.04.06

Taxonomic revision of genus Potamogeton (Potamogetonaceae) in Kashmir Himalaya, India
type: item
description: Section: Monographs/Revisions Keywords: Potamogeton species, taxonomy, morphology, first report, Kashmir Himalaya Potamogeton L. (Potamogetonaceae) is one of the diverse genera of aquatic plants. Owing to its reduced floral morphology and high phenotypic plasticity, the genus has remained taxonomically challenging. This study presents taxonomic revision of Potamogeton in Kashmir Himalaya, based on comprehensive field collections made over the last decade (2010–2020), supplemented with investigations on earlier herbarium collections. During the present study, aquatic habitats across the Kashmir Himalaya were surveyed, and 15 study sites were selected for detailed sampling spanning an elevation gradient of 1595 to 2180 m asl. The study records 12 Potamogeton species in the region, with detailed morphological characterization, identification key, line drawings, and photographs. The three species, namely, P. amblyophyllus C.A. Meyer, P. berchtoldii Fieber, and P. trichoides Cham. & Schltdl. are the first-time reports from this region, while the latter two species are new distribution records for India as well. Overall, the study brings clarity to the taxonomy of Potamogeton - the largest aquatic genus in Kashmir Himalaya, and the findings have practical implications in the sustainable management and restoration of aquatic ecosystems in this Himalayan region, with learnings for neighboring regions.
subject: Monographs/Revisions
  topic: section
subject: Potamogeton species
  topic: keywords
subject: taxonomy
  topic: keywords
subject: morphology
  topic: keywords
subject: first report
  topic: keywords
subject: Kashmir Himalaya
  topic: keywords
creator: A. H. Ganie
creator: Z. A. Reshi
creator: B. A. Wafai
creator: A. A. Khuroo
rights: Copyright (c) 2026 Rheedea https://creativecommons.org/licenses/by-nc-nd/4.0
date: 2025-12-31
publication date: 2025-12-31
starting page: 258
ending page: 285
doi: 10.22244/rheedea.2025.35.04.07

The status and conservation of Malabar River-lily (Crinum malabaricum) (Liliopsida: Amaryllidaceae)
type: item
description: Section: Articles Keywords: Ecology, Conservation, Laterite Hills, Kerala The Malabar river-lily (Crinum malabaricum Lekhak & S.R.Yadav) is endemic to northern Kerala, south-western India, it was described new to science in 2012. It is native to seasonal rivers flowing over laterite at 80-100 m above sea level, in an area of approximately 5 x 10 km in Kannur and Kasaragod Districts. Populations are limited upstream by reaches involving steeper gradients with faster flow and downstream by deeper water over silt. It typically forms dense stands covering the entire channel with leaves forming a dense mat as water levels drop. Population counts suggest that the global population is more than 25,000 individuals. All known populations are abundantly fertile, flowering and setting seed abundantly from early September to late November. C. malabaricum is a major ecosystem architect, providing shelter for fish and invertebrate communities. Overall, known populations of C. malabaricum may be considered stable and relatively secure, although there is potential for local actions to affect all populations. The apparent absence of a mechanism for formal protection of sites supporting C. malabaricum highlights the need for surveys of potentially suitable habitat within the known range of the species, as well as for monitoring of all known populations to identify population trends.
subject: Articles
  topic: section
subject: Ecology
  topic: keywords
subject: Conservation
  topic: keywords
subject: Laterite Hills
  topic: keywords
subject: Kerala
  topic: keywords
creator: R. V. Lansdown
creator: U. Ravindra
creator: P. Biju
creator: S. P. Purayil
rights: Copyright (c) 2026 Rheedea https://creativecommons.org/licenses/by-nc-nd/4.0
date: 2025-12-31
publication date: 2025-12-31
starting page: 286
ending page: 299
doi: 10.22244/rheedea.2025.35.04.08

Microecology and floristic diversity of seasonal wetlands of a lateritic plateau of South India
type: item
description: Section: Articles Keywords: Biodiversity, Conservation, Ecology, Ephemeral pools, Laterite flora, Northern Kerala An analysis of the microecology and floristic diversity of the seasonal pools on the Madayippara lateritic plateau, located in Kannur District of Kerala, South India, was conducted. Temporary wetlands of varying sizes are formed during the rainy season, supporting a large number of habitat-specific flowering plants, a greater number of which are endemic, and a few belong to various threat categories. The seasonal pools vary in their size, soil cover and texture, and are subjected to extreme diurnal changes in temperature due to the high surfaceto-volume ratio. They are characterised by high variation in soil temperature and water pH between pools and between seasons, extreme variation of water temperature in different seasons and in different hours of a day, and also hold maximum moisture content with extreme variation in different seasons. The soil type in most of the seasonal pools is sandy loam, and is the richest with respect to soil nutrients. The occurrence of high diversity of carnivorous plants in these nutrient-rich habitats is ascribed to the limitation in nutrient absorption, resulting from factors such as low pH, inundation and low phosphorus levels. Seasonal pools are highly specialised microhabitats active only in the monsoon period to support several specialised species showing a high degree of endemism owing to their characteristic microecology.
subject: Articles
  topic: section
subject: Biodiversity
  topic: keywords
subject: Conservation
  topic: keywords
subject: Ecology
  topic: keywords
subject: Ephemeral pools
  topic: keywords
subject: Laterite flora
  topic: keywords
subject: Northern Kerala
  topic: keywords
creator: C. Pramod
creator: A. K. Pradeep
creator: C. C. Harilal
creator: S. Sandeep
rights: Copyright (c) 2026 Rheedea https://creativecommons.org/licenses/by-nc-nd/4.0
date: 2025-12-31
publication date: 2025-12-31
starting page: 300
ending page: 312
doi: 10.22244/rheedea.2025.35.04.09

Neotypification of the name Diplomeris pulchella (Orchidaceae)
type: item
description: Section: Typification/Combinations Keywords: Diplomeris pulchella, Nomenclature, Typification, Wallich Diplomeris pulchella D.Don (Orchidaceae) was described with an obscure indication of the type, referring only to a Wallich collection from Nepal. Subsequent searches for Wallich specimens from Nepal failed to locate any relevant material. However, a specimen of D. pulchella collected by Wallich from Sylhet, Bangladesh, is preserved at BM. It remains uncertain whether Don mistakenly cited the locality as “Nepalia” instead of Sylhet, or whether the BM specimen does not represent original material. As the BM specimen cannot be confidently confirmed as original material, it is here designated as the neotype.
subject: Typification/Combinations
  topic: section
subject: Diplomeris pulchella, Nomenclature, Typification, Wallich
  topic: keywords
creator: Kapil Kumar Kemprai
creator: Bimisa Khersa
creator: Birina Bhuyan
creator: Chaya Deori
creator: Longjam Malemnganbee Chanu
creator: Pramod Medhi
creator: Souravjyoti Borah
rights: Copyright (c) 2026 Rheedea https://creativecommons.org/licenses/by-nc-nd/4.0
date: 2026-03-31
publication date: 2026-03-31
starting page: e1186
ending page: e1186
doi: 10.22244/rheedea.36.1186

Typification of Candollean names in the tribe Gnaphalieae (Asteraceae)
type: item
description: Section: Typification/Combinations Keywords: Anaphalis, Helichrysum, Lectotype, Pseudognaphalium Revisionary studies on the tribe Gnaphalieae of Asteraceae (subfam. Asteroideae) in southern India could identify many names attached to different collections at various herbaria, without precise original materials designated as types. Candollean names of Anaphalis notoniana DC., Helichrysum buddleioides DC., and Pseudognaphalium hypoleucum (DC.) Hilliard & B.L.Burtt, have been typified following the latest botanical code.
subject: Typification/Combinations
  topic: section
subject: Anaphalis, Helichrysum, Lectotype, Pseudognaphalium
  topic: keywords
creator: S. Remya
creator: C.N. Maya
rights: Copyright (c) 2026 Rheedea https://creativecommons.org/licenses/by-nc-nd/4.0
date: 2026-03-31
publication date: 2026-03-31
starting page: e1184
ending page: e1184
doi: 10.22244/rheedea.36.1184

Taxonomic reassessment of Impatiens verecunda (Balsaminaceae) and its synonymization with I. cordata in the Western Ghats, India
type: item
description: Section: Articles Keywords: Anamalai hills, Devikulam, Idukki, Impatiens anaimudica, Kerala Historical records, such as those by J.D. Hooker and subsequent studies, have noted taxonomic complexities in Impatiens verecunda Hook.f. and its relationship with I. cordata Wight and I. anaimudica C.E.C.Fisch. Field surveys in Devikulam, Kerala, discovered specimens resembling I. verecunda, prompting detailed morphological comparisons with I. cordata and I. anaimudica. The plants exhibited similarities to I. cordata, differing only in habitat-driven traits like short stature and short floral spurs, confirmed the synonymization of I. verecunda under I. cordata. Conversely, I. anaimudica remains distinct due to its lenticelled stems, crimson flowers, and unique spur morphology. Further studies on I. cordata populations revealed variations in life history, habit, flower color, spur length, and floral morphology, influenced by environmental conditions. A revised description of I. cordata is presented to account for these variations and clarify its distinction from closely related taxa like I. elegans Bedd.
subject: Articles
  topic: section
subject: Anamalai hills, Devikulam, Idukki, Impatiens anaimudica, Kerala
  topic: keywords
creator: M.A. Anitha
creator: Sinjumol Thomas
creator: Bince Mani
rights: Copyright (c) 2026 Rheedea https://creativecommons.org/licenses/by-nc-nd/4.0
date: 2026-03-31
publication date: 2026-03-31
starting page: e1182
ending page: e1182
doi: 10.22244/rheedea.36.1182

Physalis cordata (Solanaceae): a new record for India
type: item
description: Section: New Reports Keywords: Physalis, North 24 Parganas district, West Bengal, Invasive species, Native of Americas Physalis cordata Houst. ex Mill. (Solanaceae), a native of North and South America has been collected from North 24-Parganas district of West Bengal, India in 2024 is reported here as an addition to the Flora of India. Morphological description, location map and a photo plate are provided here for its proper recognition.
subject: New Reports
  topic: section
subject: Physalis, North 24 Parganas district, West Bengal, Invasive species, Native of Americas
  topic: keywords
creator: S. Chowdhury
creator: T.K. Paul
creator: A.P. Das
rights: Copyright (c) 2026 Rheedea https://creativecommons.org/licenses/by-nc-nd/4.0
date: 2026-03-31
publication date: 2026-03-31
starting page: e1188
ending page: e1188
doi: 10.22244/rheedea.36.1188

A taxonomic revision of the genus Justicia (Acanthaceae) in Peninsular India
type: item
description: Section: Monographs/Revisions Keywords: Conservation Assessment,, Justicieae, Lectotypification, Synonymization A detailed taxonomic account of the genus Justicia L. in Peninsular India is provided, with 18 species recognized. Lectotypifications of six names are carried out. Nine taxa are treated as synonyms: Justicia diffusa var. orbiculata C.B.Clarke of J. diffusa Willd.; J. nilgherrensis (Nees) Wall. ex C.B.Clarke and J. tamilnadensis P.Raja & Soosairaj of J. trinervia Vahl; J. nagpurensis V.A.W.Graham, J. notha C.B.Clarke and J. pathanamthittiensis Remadevi & Binojk. of J. procumbens L.; J. quinqueangularis var. kawalii Annamma & Venu of J. quinqueangularis J.Koenig ex Roxb.; J. salsoloides T.Anderson of J. tranquebariensis L.f. and J. vahlii var. rupicola (J.L.Ellis) Pull., Moulali & Sandhyar. of J. vahliana Schult. Detailed descriptions, photographic images and a key for identifying species in Peninsular India are provided along with data on phenology, distribution and conservation status.
subject: Monographs/Revisions
  topic: section
subject: Conservation Assessment,
  topic: keywords
subject: Justicieae
  topic: keywords
subject: Lectotypification
  topic: keywords
subject: Synonymization
  topic: keywords
creator: P. Soumya
creator: Y.F. Deng
creator: S.S. Dash
creator: P. Sunojkumar
rights: Copyright (c) 2026 Rheedea https://creativecommons.org/licenses/by-nc-nd/4.0
date: 2026-04-03
publication date: 2026-04-03
starting page: 270
ending page: 331
doi: 10.22244/rheedea.2023.33.04.03

Peter Hamilton Raven (1936–2026): A Global Architect of Biodiversity Conservation and a Friend to Indian Botany
type: item
description: Section: Obituaries Keywords: Peter Hamilton Raven, Obituary No abstract for this article
subject: Obituaries
  topic: section
subject: Peter Hamilton Raven
  topic: keywords
subject: Obituary
  topic: keywords
creator: Peter Wyse Jackson
rights: Copyright (c) 2026 Rheedea https://creativecommons.org/licenses/by-nc-nd/4.0
date: 2026-06-30
publication date: 2026-06-30
starting page: e1245
ending page: e1245
doi: 10.22244/rheedea.36.1245

Dr. Amarjit Singh Soodan: A Renowned Botanist, Taxonomist and A Mentor
type: item
description: Section: Obituaries Keywords: Grass flora, Phytoliths Dr. Amarjit Singh Soodan, one of India’s renowned botanists and a distinguished figure in plant taxonomy and phytolith research, passed away peacefully at his residence in Alpha International City, Daburgi, Amritsar on 21 November 2025. He was 66 years old and is survived by his wife and two children. His departure marks the end of an era for the botanical community of North India, where he inspired generations of students, researchers and colleagues through his scholarship, humility and unwavering commitment to the discipline of botany.
subject: Obituaries
  topic: section
subject: Grass flora
  topic: keywords
subject: Phytoliths
  topic: keywords
creator: Rajinder Kaur
creator: Mayank Dwivedi
rights: Copyright (c) 2026 Rheedea https://creativecommons.org/licenses/by-nc-nd/4.0
date: 2026-06-30
publication date: 2026-06-30
starting page: e1215
ending page: e1215
doi: 10.22244/rheedea.36.1215

Iconic Trees of India
type: item
description: Section: Book Reviews Authored by Natesh S. Illustrations by Sagar Bhowmick. Published by Roli Books, Delhi, India. Hardbound. ISBN: 9789392130342. Pages 256. Price: (INR) 1995.00
subject: Book Reviews
  topic: section
creator: R. Uma Shaanker
rights: Copyright (c) 2026 Rheedea https://creativecommons.org/licenses/by-nc-nd/4.0
date: 2026-03-31
publication date: 2026-03-31
starting page: e1190
ending page: e1190
doi: 10.22244/rheedea.36.1190

Note on taxonomy and typification of Vigna hainiana Babu, Gopinathan & Sharma ( =Phaseolus wightii W. & A.)
type: item
description: Section: Typification/Combinations Vigna hainiana Babu, Gopinathan & Sharma, collected from north-western and eastern parts of India, has been studied. Characters for differentiating this species have been delineated. The type indicated previously for V. hainiana was incorrect; Wall. L. n. 5591 is the lectotype for this species.
subject: Typification/Combinations
  topic: section
creator: E. Roshini Nayar
rights: Copyright (c) 2026 Rheedea https://creativecommons.org/licenses/by-nc-nd/4.0
date: 1994-12-31
publication date: 1994-12-31
starting page: 136
ending page: 137
doi: 10.22244/rheedea.1994.04.02.11

Book Review: Know Your Grass Genera Through Hand Lens
type: item
description: Section: Book Reviews -
subject: Book Reviews
  topic: section
creator: V. J. Nair
rights: Copyright (c) 2026 Rheedea https://creativecommons.org/licenses/by-nc-nd/4.0
date: 2010-06-30
publication date: 2010-06-30
starting page: 71
ending page: 72
doi: 10.22244/rheedea.2010.20.01.15

The Genus Ludwigia (Onagraceae) in India
type: item
description: Section: Articles Keywords: India, Ludwigia, Taxonomy The genus Ludwigia L. consists of seven species and one infraspecific taxon in India, of which L. decurrens forms the first report for India. This revision provides a key to species, descriptions and illustrations along with data on phenology, distribution and notes on ecology.
subject: Articles
  topic: section
subject: India
  topic: keywords
subject: Ludwigia
  topic: keywords
subject: Taxonomy
  topic: keywords
creator: I. C. Barua
rights: Copyright (c) 2026 Rheedea https://creativecommons.org/licenses/by-nc-nd/4.0
date: 2010-06-30
publication date: 2010-06-30
starting page: 59
ending page: 70
doi: 10.22244/rheedea.2010.20.01.14

Solanum cordatum (Solanaceae) – A new record to Southern India
type: item
description: Section: New Reports Keywords: Kolli hills, New record, Solanum cordatum, Southern India While preparing an inventory of flowering plants of the Kolli hills, Namakkal district, Tamil Nadu, Southern India, some specimens of Solanum L. were collected and identified as S. cordatum Forssk. On scrutiny of literature, it is revealed that this species is known only from Gujarat in India and forms a new record to Southern India. Hence, a detailed description, phenology and illustration are provided to facilitate easy identification of the species.
subject: New Reports
  topic: section
subject: Kolli hills
  topic: keywords
subject: New record
  topic: keywords
subject: Solanum cordatum
  topic: keywords
subject: Southern India
  topic: keywords
creator: A. Ramachandran
creator: M. B. Viswanathan
rights: Copyright (c) 2026 Rheedea https://creativecommons.org/licenses/by-nc-nd/4.0
date: 2010-06-30
publication date: 2010-06-30
starting page: 56
ending page: 58
doi: 10.22244/rheedea.2010.20.01.13

Syzygium claviflorum (Myrtaceae) – A new record for South India
type: item
description: Section: New Reports Keywords: Myrtaceae, New record, South India, Syzygium claviflorum Syzygium claviflorum (Roxb.) Wall. ex A.M. Cowan et Cowan, a Myrtaceous tree species is reported for the first time for South India from Agasthyamalai Biosphere Reserve of the southern Western Ghats. A brief description and illustration of the species are provided herewith for easy identification.
subject: New Reports
  topic: section
subject: Myrtaceae
  topic: keywords
subject: New record
  topic: keywords
subject: South India
  topic: keywords
subject: Syzygium claviflorum
  topic: keywords
creator: S. M. Shareef
creator: M. P. Geetha Kumary
creator: E. S. Santhosh Kumar
creator: T. Shaju
rights: Copyright (c) 2026 Rheedea https://creativecommons.org/licenses/by-nc-nd/4.0
date: 2010-06-30
publication date: 2010-06-30
starting page: 53
ending page: 55
doi: 10.22244/rheedea.2010.20.01.12

Rediscovery of Pogostemon nilagiricus (Lamiaceae), a steno-endemic and critically endangered aromatic species
type: item
description: Section: Articles Keywords: Aromatic plant, Endemic, Lamiaceae, Nilgiri, Pogostemon Pogostemon nilagiricus Gamble (Lamiaceae) is rediscovered from Nilgiri hills, the type locality, after a gap of 97 years. A detailed description, photograph and note on its taxonomy are provided. Current threat status has also been assessed based on the recent botanical explorations.
subject: Articles
  topic: section
subject: Aromatic plant
  topic: keywords
subject: Endemic
  topic: keywords
subject: Lamiaceae
  topic: keywords
subject: Nilgiri
  topic: keywords
subject: Pogostemon
  topic: keywords
creator: R. Murugan
creator: K. Ravikumar
creator: C. Livingstone
rights: Copyright (c) 2026 Rheedea https://creativecommons.org/licenses/by-nc-nd/4.0
date: 2010-06-30
publication date: 2010-06-30
starting page: 50
ending page: 52
doi: 10.22244/rheedea.2010.20.01.11