Begoniaceae

Begonia sp.

Ha Giang Prov., Quan Ba Distr., Can Ty Commune, Sin Suoi Ho Village, around point 23.09566ºN 105.02142ºE. Very steep mountain slopes composed of solid highly eroded karstic limestone at elevation 800–1000 m a.s.l. Remnants of primary evergreen broad-leaved and coniferous (with Calocedrus rupestris and Xanthocyparis vietnamensis) humid forest. Terrestrial and lithophytic rhizomatous herb in shady place among rocks. Leaves dark green above, light pale green below, petioles dull dirty purple. Flowers white with light pink tint. Locally very common. 11 October 2019, L. Averyanov, Nguyen Sinh Khang, T. Maisak, VR 1549.

Begonia longa C.-I Peng & W.C.Leong, 2014, in Ching-I Peng et al., Botanical Studies 55: 8 (Two new species of Begonia sect. Coelocentrum, B. guixiensis and B. longa, from Sino-Vietnamese limestone karsts)

TYPE: VIETNAM. Ha Giang Province, Quan Ba District, Can Ty Community, Sin Suoi Ho Village, elev. 650–1500 m; on face of limestone rock, in shaded and moist broadleaf forest on mountain slope. Locally frequent. Living collection made on 12 Nov 2004; type specimens (in flower) pressed from plants cultivated in the experimental greenhouse, Academia Sinica, 10 May 2007. Ching-I Peng, Wai-Chao Leong, Shin-Ming Ku, Tien Hiep Nguyen, Van The Pham & Xuan Tam Nguyen 20076-A (holotype: HAST; isotypes: A, E, FRIM, MO, P).