Begonia sizemoreae Kiew, 2004

Ding, Hong-Bo, Maw, Mya Bhone, Yang, Bin, Bouamanivong, Somsanith & Tan, Yun-Hong, 2020, An updated checklist of Begonia (Begoniaceae) in Laos, with two new species and five new records, PhytoKeys 138, pp. 187-201 : 187

Begonia sizemoreae Kiew Figure 4 D-F

Begonia sizemoreae Kiew, in Gard. Bull. Singapore 56: 95. 2004; Kiew R. in Adansonia sér. 3, 29(2): 234. 2007. Type: Vietnam, Ba Vi National Park, Ha Tay Province, ca. 80 km west of Hanoi, Accession No. 20020399 cult. in Singapore Botanic Gardens ex Palm Hammock Orchid Estate, Miami, U.S.A. R. Kiew 5304 (holotype: SING, isotype: HN).

Specimens examined.

Laos. Phongsaly Province, Phou Dean Din National Bio-Diversity Park, 21°46'02.39"N, 102°31'28.58"E. 1111 m elev., 8 April 2018, Y.H. Tan, B. Yang, H.B. Ding & X.D. Zeng L0559 (HITBC).

Distribution.

Vietnam, Laos.

Note.

Begonia sizemoreae was originally described in north Vietnam. Now, its distribution in Laos has been confirmed. This species is very similar to B. rex Putz. ( Putzey 1857: 141) from Assam, India, in its leaf shape, fine variegated leaves and flower structure, but it is distinct in its leaf margin with very hairy upper surface of the lamina with hairs 5-10 mm long and its conspicuous deep crimson tertiary venation in the centre and outer part of the lower leaf surface ( Kiew 2004, 2007).

Figures

Figure 4. A-C Begonia lancangensis S. H. Huang: A habitat B staminate flower (front view) C staminate flower (back view) D-F Begonia sizemoreae Kiew: D habitat E staminate flower F pistillate flower G-I Begonia silletensis (A. DC.) C. B. Clarke subsp. mengyangensis M. C. Tebbitt & K. - Y. Guan: G habitat H inflorescence I staminate flower (front view). Photographed by H. B. Ding and Y. H. Tan.