Begonia dakrongensis (Begoniaceae), a new species from Dakrong Nature Reserve, Quang Tri province in Central Vietnam Author Nguyen, Cuong Huu 0000-0003-2281-741X Vietnam National University of Forestry, 21 A Street, Xuan Mai, Chuong My, Hanoi, Vietnam nguyenhuucuong.tvr@gmail.com Author Le, Anh Tuan 0000-0002-5917-3243 Mien Trung Institute for Scientific Research, Vietnam National Museum of Nature, Vietnam Academy of Science and Technology, 321 Huynh Thuc Khang street, Thua Thien Hue, Vietnam tasa207@gmail.com Author Ha, Van Bac 0009-0003-0024-2608 Dakrong Natural Reserve, Ta Long, Dakrong, Quang Tri, Vietnam havanbacklqt@gmail.com Author Lin, Che Wei 0000-0002-8564-5793 Herbarium of Taiwan Forestry Research Institute, Taiwan Forestry Research Institute, No. 53, Nan-Hai Road, Taipei 100, Taiwan varalba@gmail.com text Phytotaxa 2024 2024-04-18 645 1 85 90 http://dx.doi.org/10.11646/phytotaxa.645.1.8 journal article 301781 10.11646/phytotaxa.645.1.8 6c2ae488-eba6-425d-bc65-1fd053e748ed 1179-3163 13214900
TABLE 1. Comparison of Begonia dakrongensis C.H.Nguyen, T.A.Le & C.W.Lin, B. abbrevata C.I Peng and B. eberhardtii Gagnepain.
B. dakrongensis (Figs. 1, 2)B. abbrevataB. eberhardtii *
* Based on observation of type specimens (P.A. Eberhardt 3106, P).
Leafnot oblique or nearly soobliqueoblique
petiole length (cm)1.3–3.52–54–8.8
shapeobtriangular-spathulate to oblong-obovate or widely obovatebroadly ovateovate
abaxial vestituresparsely villous-hirsute and scabrous on veinstomentulose on veinstomentulose on veins
size (cm)4.7–17 × 3–136−17 × 5–127.5−11 × 3.5–8.5
margindenticulate on the upper two-thirds, sometimes with coarsely dentate entire and irregularly angularirregularly and coarsely dentate lobes
Bracts
size (first pair)ca. 7 × 4.5 mmca. 18 × 6 mmca. 6 ×3 mm
Staminate flower
number of stamensca. 2540–5228–43
anthers shapewidely obovatenarrowly obovatenarrowly obovate
Ovary
shapetrigonous-globosetrigonous-elliptictrigonous-elliptic
vestituredensely scabroussparsely hirsuteglabrous
wings vestiturered scabrousglabrous or subglabrousglabrous
Capsule pedicel length (mm)ca. 1up to 132–5