Species
B. rugosula
Photos
3 photos
Identity
- Genus
- Begonia
- Name
- B. rugosula
- Author
- L.V. Averyanov & H.Q. Nguyen, Eleven new species of Begonia L. (Begoniaceae) from Laos and Vietnam.
- Publication Date
- 2012
- Date of Origin
- 2011
- Place
- Northern Vietnam, Bac Kan prov., Cho Don distr., Xuan Lac municipality, Lung Ly locality
- Habitat
- Lung Ly locality, 950 m; Primary broad-leaved and coniferous evergreen forests on remnant mountains composed with solid marble-like highly eroded rocky limestone at elevations 700–950 m a.s.l. Lithophytic creeping herb growing in crevices of vertical shady cliffs near tops of remnant karstic hills. Flowers in March – May, fruits in June – July (August). Locally common (VU).
- Country
- Vietnam
- Region
- Asia
- Section
- Coelocentrum
- Plant Type
- Rhizomatous
- Reference
- Turczaninowia 15(2): 6, 2012 ‘Eleven New Species of Begonia L. (Begoniaceae) From Laos And Vietnam’ Authors: L.V. Averyanov Л.В. Аверьянов & H.Q. Nguyen Х.К. Нгуен
Plant
- Description
- Lithophytic, evergreen, stemless, regularly monoecious, herb; Rhizome plagiotropic, creeping, fleshy, more or less straight, (5)7–12(15) cm long, (2)3–4(5) mm in diam., densely hairy with longciliate white hairs, with 3–6(8) erect, distant leaves, internodes (0.6)1–2(4) cm long, at nodes with few dark brown, thin, filiform roots faced to the ground.
- Growth Type
- Rhizome plagiotropic, creeping, fleshy, more or less straight, (5)7-12(15) cm long, (2)3-4(5) mm in diam., densely hairy with longciliate white hairs, with 3-6(8) erect, distant leaves, internodes (0.6)1-2(4) cm long, at nodes with few dark brown, thin, filiform roots faced to the ground.
Lineage
Parents
No parentage recorded.
Descendants
No recorded descendants.
Culture
- Comments
- Species name refers finely rugose leaf surface.New species has certain relation to B. auritistipula Y.M. Shui et W.H. Chen described on the base of plants cultivated in Guangxi Botanical Garden of Medicinal Plants and in Kunming Botanical Garden (Shui, Chen, 2005) and originated expectedly from Guangxi. Nevertheless, their origin remains unknown up to now (Gu et al., 2007). Discovered plant has also obvious similarity with B. debaoensis C.-I Peng, Yan Liu et S.M. Ku described from SW Guangxi, B. obliquifolia S.H. Huang et Y.M. Shui described from SE Yunnan and insufficiently known species, B. bonii Gagnep., reported from northern Vietnam (Tonkin). Our plants (collected directly in nature) distinctly differs from mentioned species in smaller size of all its parts, in straight creeping rhizome, in hairy, ciliate and mucronate stipules, in densely villous petioles and rugose densely hirsute leaves (on both surfaces), in white to olive-green flowers, in sparsely rusty-glandular hairy sepals, in capitate stigmas (not band-like) and in ovary hairy with very short, rusty-glandular hairs (not strigose-hirsute). Our species is certainly very local calcium dependent endemic of northern Vietnam. Meanwhile, it was observed as important co-dominant of herbaceous lithophytic plant cover in its area very restricted geographically.
- Endangered Status
- VU
- Original Botanical Description or Link to
- http://www.botanyvn.com/cnt.asp?param=news&newsid=1495&lg=en