Abstract
During the revision of the genus Lagenandra in Sri Lanka we encountered a new species Lagenandra rubra from the Sinharaja Man and Biosphere Reserve of Sri Lanka. The new species can be differentiated from all other described Lagenandra species by its glossy dark red-maroon twisted limb and the absence of warts on the spathe. With the newly described species, the number of endemic Sri Lankan species of Lagenandra rises to fourteen, and the global total rises to twenty-three. Based on the IUCN Red List categories and criteria, the new species is assessed as Critically Endangered under Criterion CR B1ab (ii, iii, iv, v) +2ab (ii, iii, iv, v).
References
- Bastmeijer, J.D. (2024) The Lagenandra pages. Available from: https://www.cryptocoryneworld.org/lagenandra_index.php (accessed 20 February 2025)
- Biju, P., Josekutty, E.J. & Augustine, J. (2018) Lagenandra cherupuzhica (Araceae), a new species from Kerala India. Annales Botanici Fennici 55: 139–143. https://doi.org/10.5735/085.055.0116
- Bruggen, H.W.E. van (1962) Aponogeton rigidifolius H. Bruggen sp. nov. Mededelingen van de Botanische tuinen en het Belmonte arboretum der L. S. H. te Wageningen 6 (6): 88–91.
- Crusio, W. & Graaf, A. de (1986) Lagenandra dewitii Crusio et De Graaf (Araceae), eine neue Art aus Sri Lanka. Aqua Planta 2–86: 56–59.
- Dalzell, N.A. (1852) Contributions to the botany of Western India. Hooker’s Journal of Botany and Kew Garden Miscellany 4: 289–295.
- Engler, A. (1879) Araceae. In: De Candolle, A. & De Candolle, C. (Eds.) Monographiae Phanerogamarum. Vol. 2. G. Masson, Paris, pp. 1–681.
- ESRI (2017) ArcGIS Desktop: Release 10.4. Environmental Systems Research Institute, Redlands.
- Fischer, C.E.C. (1938) New or little-known plants from Southern India: IX. Bulletin of Miscellaneous Information (Royal Botanic Gardens, Kew) 3: 123–127. https://doi.org/10.2307/4107628
- GBIF (2024) Lagenandra Dalzell. Available from: https://www.gbif.org/species/search?q=Lagenandra (accessed 15 February 2024)
- Gunatilleke, C.V.S. & Gunatilleke, I.A.U.N. (1991) Threatened woody endemics of the wet lowlands of Sri Lanka and their conservation. Biological Conservation 55: 17–36. https://doi.org/10.1016/0006-3207(91)90003-R
- IUCN Standards and Petitions Committee (2024) Guidelines for Using the IUCN Red List Categories and Criteria. Version 15. Prepared by the Standards and petitions committee. Available from: https://www.iucnredlist.org/documents/RedListGuidelines.pdf (accessed 20 February 2025)
- JSTOR Global Plants (2024) Available from: https://plants.jstor.org/ (accessed 8 March 2024)
- Linnaeus, C. (1753) Species plantarum, exhibentes plantas rite cognitas ad genera relatas, cum differentiis specificis, nominibus trivialibus, synonymis selectis, locis natalibus, secundum systema sexuale digestas. Vol. 2. Laurentius Salvius, Stockholm. 1200 pp. https://doi.org/10.5962/bhl.title.669
- Madola, I., Yakandawala, K., Yakandawala, D. & Karunaratne, S. (2021a) Lagenandra wayambae (Araceae), a new endemic species from a freshwater swamp forest of Sri Lanka. Phytotaxa 489: 216–222. https://doi.org/10.11646/phytotaxa.489.2.10
- Madola, I., Yakandawala, D., Yakandawala, K. & Karunaratne, S. (2021b) Two new species of Lagenandra (Araceae) from the wet zone of Sri Lanka. Phytotaxa 522: 187–199. https://doi.org/10.11646/phytotaxa.522.3.2
- Madola, I., Yakandawala, D. & Yakandawala, K. (2022) A new Lagenandra species with two varieties from the Wet Zone of Sri Lanka. Phytotaxa 567: 110–126. https://doi.org/10.11646/phytotaxa.567.2.1
- Madola, I., Yakandawala, D. & Yakandawala, K. (2023) Lagenandra limbusleviterapertae, a new addition to the genus Lagenandra (Araceae) from Sri Lanka. Phytotaxa 601: 61–70. https://doi.org/10.11646/phytotaxa.601.1.4
- Madola, I., Karunarathna, P.P., Yakandawala, D. & Yakandawala, K. (2023b) Rediscovery of Lagenandra erosa from Sri Lanka: update of description and conservation status. Phytotaxa 622: 227–235. https://doi.org/10.11646/phytotaxa.622.3.5
- Mathew, J., Salim, P.M. & Karunakaran, K. (2023) Lagenandra kunkichirimuseumensis (Araceae), a new species from south Western Ghats, India. Species 24: e59s1564. https://doi.org/10.54905/disssi.v24i74.e59s1564
- Mittermeier, R.A., Gil, P.R., Hoffman, M., Pilgrim, J., Brooks, T., Mittermeier, C.G., Lamoreux, J. & da Fonseca, G.A.B. (2004) Hotspots Revisited: Earth’s Biologically Richest and Most Endangered Terrestrial Ecoregions. CEMEX, Mexico City.
- Mittermeier, R.A., Turner, W.R., Larsen, F.W., Brooks, T.M. & Gascon, C. (2011) Global biodiversity conservation: the critical role of hotspots. In: Zachos, F.E. & Habel, J.C. (Eds.) Biodiversity hotspots: distribution and protection of conservation priority areas. Springer, Berlin, pp. 3–22. https://doi.org/10.1007/978-3-642-20992-5_1
- Myers, N., Mittermeier, R.A., Mittermeier, C.G., Da Fonseca, G.A. & Kent, J. (2000) Biodiversity hotspots for conservation priorities. Nature 403: 853–858. https://doi.org/10.1038/35002501
- National Conservation Review [NCR] (1997) Designing an optimum protected areas system for Sri Lanka’s natural forests, Vol. 1. IUCN/FAO.
- Nicolson, D.H. (1987) Araceae. In: Dassanayake, M.D. & Fosberg, F.R. (Eds.) A Revised Handbook to the Flora of Ceylon. Vol. VI. Amerind Publishing Co, Pvt Ltd, New Delhi, pp. 75–85.
- POWO (2024) Plants of the World Online. Facilitated by the Royal Botanic Gardens, Kew. Available from: https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:2827-1#publications (accessed 20 May 2024)
- Sasikala, K., Vajravelu, E. & Daniel, P. (2019) Fascicles of Flora of India, Fascicle 29 Araceae. Botanical Survey of India, pp. 1–358 & Plate 1–33.
- Schott, H.W. (1857) Cryptocorynenskizze. Bonplandia 5: 219–223.
- Schott, H.W. (1859) Cryptocoryne Koenigii. Bonplandia 7: 80–82.
- Senanayake, F.R. (1980) Biogeography and ecology of the inland fishes of Sri Lanka. PhD thesis, University of California, Davis.
- Sivadasan, M. & Babu, C.M. (1995) A little known endemic and rare variety of Lagenandra toxicaria Dalzell (Araceae). Rheedea 5: 187–190.
- Sivadasan, M., Jaleel, V.A. & Thomas, B. (2001) Lagenandra keralensis (Araceae), a remarkable new species from India. Botanical Bulletin of Academia Sinica 42: 153–157. https://doi.org/10.7016/BBAS.200104.0153
- Smithsonian National Museum of Natural History (2024) Botany collections. Available from: https://collections.nmnh.si.edu/search/botany/ (accessed 10 April 2024)
- Sri Bharathie, K.P. (1979) Natural regeneration in the exploited section of the Sinharaja Reserve. The Sri Lanka Forester 14: 41–42.
- The National Red List—2020 Conservation Status of the Flora of Sri Lanka (2020) Sri Lanka: Biodiversity Secretariat, Ministry of Environment and the National Herbarium, Department of National Botanic Gardens, 254 pp.
- Thwaites, G.H.K. (1864) Enumeratio Plantarum Zeylaniae. Dulau & Co, London, 334 pp.
- Wit, H.C.D. de (1978) Revisie van het genus Lagenandra Dalzell (Araceae). Mededeelingen van de Landbouwhoogeschool te Wageningen 78: 1–45.
- Wit, H.C.D. de (1983) Aquarienpflanzen. Verlag Eugen Ulmer Stuttgart, 464 pp.
- Wydler, H. (1830) Plantarum quarundam descriptiones. Linnaea: Ein Journal für die Botanik in ihrem ganzen Umfange 5: 423–430.
- Yakandawala, D. (2012) Present status of fresh water aquatic flora in Sri Lanka. In: Weerakoon, D.K. & Wijesundara, S. (Eds.) The National Red List 2012 of Sri Lanka; Conservation Status of the Fauna and Flora. Ministry of Environment, Colombo, pp. 186–196.
