|Begonia acetosella Craib.; Begonia annulata K.Koch.; Begonia dioica Buch.-Ham. ex D.Don. |
Begonia beddomei Hook.f. by M. Smith (Hooker 1884); Begonia cathcartii Hook.f. by W.H. Fitch (Hooker 1855); Begonia pedunculosa Wall. by Vishnupersaud (Wallich 1830).
in Camfield & Hughes, 2018.
Following a taxonomic revision of Begonia L. (Begoniaceae, Cucurbitales) from Northeast India based on 332 herbarium specimens, 38 species are confirmed to occur in the region, of which ten are endemic. One new species is described, Begonia koelzii R.Camfield sp. nov., in B. sect. Platycentrum (Klotzsch) A.DC. One species is reduced into synonymy; B. barbata Wall. is now a synonym of B. thomsonii A.DC. Three species, B. difformis (Irmsch.) W.C.Leong, C.I Peng & K.F.Chung, B. labordei H.Lév. and B. handelii Irmsch., are reported new for India, and B. lushaiensis C.E.C.Fisch. is reinstated as an accepted species, having previously been synonymised under B. modestiflora Kurz. A key to the species in the region and preliminary conservation assessments are presented.
Keywords: Begonia; taxonomy; revision; Northeast India
|Fig. 34. Begonia koelzii R.Camfield sp. nov. A. Plant habit. B. Leaf. C. Bulbil. D. Young female flowers. E. Fruit. Photographs courtesy of Nick Macer, of a plant in Manipur.|
Begonia koelzii R.Camfield sp. nov. [sect. Platycentrum]
Diagnosis: Similar to B. macrotoma Irmsch. (1951: 41) in having lacerate leaves, but differs in having a larger lamina (20–40 cm long, not 12–15 cm) and female flowers with 4–6 (not 3) tepals.
Etymology: The epithet honours Walter N. Koelz (1895–1989), the American zoologist who collected the type.
Distribution and phenology: Endemic to the Arakan Mountain Range, usually found growing on cliff faces; 1000–2100 m.
Conservation status Data Deficient: The full distribution of B. koelzii in the Arakan mountains is unknown
Rebecca Camfield and Mark Hughes. 2018. A Revision and One New Species of Begonia L. (Begoniaceae, Cucurbitales) in Northeast India. European Journal of Taxonomy. 396; 1–116. DOI: 10.5852/ejt.2018.396