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| Begonia daunhitam W.G. Wang, C.X.L. Wang, S.Z. Zhang & A. Randi
in Wang, Randi, Wang, et al., 2020.
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ABSTRACT
Begonia daunhitam, a new species from West Kalimantan, Indonesia with strongly bullate black leaves is described and illustrated here, and details of the distribution, ecology and conservation status are provided.
KEY WORDS: Begonia darthvaderiana, Begonia daunhitam, Begoniaceae, Borneo, Indonesia, new taxa, taxonomy.
Begonia daunhitam W.G. Wang, C.X.L. Wang, S.Z. Zhang & A. Randi, sp. nov.
黑森林秋海棠
Sect. Petermannia
Type: INDONESIA. Borneo. West Kalimantan Province. Kapuas Hulu Regency, Boyan Tanjung District, ..., (..., 260 m alt.), 23 September 2016, A. Randi AR-855-KB (holotype BO!, isotype BO!).
Diagnosis: This new species is similar to B. darthvaderiana in having dark olive nearly black leaves and pink flowers, but differing in having a dichasial cyme inflorescence, adaxial surface of leaves being strongly bullate, denticulate at the margin and without a narrow silvery band along the leaves margin and many more stamens (fig. 3).
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| Fig. 1. Begonia daunhitam W.G.Wang, C.X.L Wang, S.Z. Zhang & A. Randi, sp. nov. A. Habit; B. Cultivated individual; C. Inflorescence; D. Both side surface of the leaves; E, G. Side view of staminate flower; F. Front view of staminate flower; H, I. Front view of pistillate flower; J. Side view of pistillate flower; K. Cross section of ovary. (A, C, H: Photo by Ripin; B, D, E, F, G, I, J, K: Photo by C. X. L. Wang). |
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Fig. 2. Begonia daunhitam W.G.Wang, C.X.L Wang, S.Z. Zhang & A. Randi, sp. nov.
A. Habit; B. The margin of the leaf; C. Petiole; D. Bract; E. Inflorescence; F. Front view of staminate flower; G. Side view of staminate flower; H. Androecium; I. Side view of pistillate flower; J, K. Front view of pistillate flower; L. Styles; M. Cross section of ovary.
(Drawn by Mr. Zhi-Ming Li, based on the plants cultivated in XTBG).
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Distribution: Endemic to Borneo, so far only recorded from ..., Boyan Tanjung district, Kapuas Hulu regency, West Kalimantan province, Indonesia (Fig. 4).
Habitat: Grows in wet areas on slopes near the river under dense canopies of dipterocarp forest at elevation 200–300 m asl.
Etymology: The specific epithet refers to the color of the leaves in Bahasa Indonesia, daun hitam = black leaves (daun = leaves, hitam = black).
Wen-Guang Wang, Agusti Randi, Cheng-Xin-Luo Wang, Jian-Yong Shen, Xing-Da Ma, Ji-Pu Shi, Ting Xu and Shou-Zhou Zhang. 2020. Begonia daunhitam, A New Species of Begonia (Begoniaceae) from West Kalimantan, Indonesia. Taiwania. 65(1); 27-32. DOI: 10.6165/tai.2020.65.27
