Corresponding authors: Xiao-Feng Huang (
Academic editor: Jan Wieringa
The previously reported begonias in a limestone forest of Guangxi mainly belong to
Feng X-X, Huang X-F, Huang Y-N, Liu Z-X, Li R-K, Zhou J-Y, Guo W, Chen X-Y, Tian D-K (2022)
According to the latest report, China’s wild begonias have already increased to 239 species (
In Guangxi, only 11 species belong to
An unknown
Morphological characters were observed and measured from fresh samples in the field. Morphological comparisons with similar taxa were undertaken by consulting the literature, examining herbarium (IBK and
The fresh leaves of the putative new species and the morphologically similar allied species,
Taxon | Origin | GenBank accession no. | Section | Collector, voucher (Herbarium) |
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Mengla, Yunnan, China |
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Wang, W.G., WWG005 (HITBC) | |
Malipo, Yunnan, China |
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Shui, Y.M. et al. 20484 (KUN) | |
Napo, Guangxi, China |
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Tian, D.K., Li, C. TDK785 ( |
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Xinyi, Guangdong, China |
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Tian, D.K., Li, X.P. TDK866 ( |
|
Yunnan,China |
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|
Y,M,Shui et al.GBOWS1284 (KUN) | |
– |
|
– | ||
Bama, Guangxi, China |
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|
Tian, D.K., Li, C. TDK757 ( |
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Yongshun, Huhan, China |
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Li, X.P. Li, X.J. LXJ022 ( |
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Fengshan, Guangxi, China |
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Tian, D.K., Li, C. TDK763 ( |
|
– |
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|
– | |
– |
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|
– | |
Leshan, Sichuan, China |
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Tian, D.K., Tian, L.Z. TDK2249 ( |
|
Gejiu, Yunnan, China |
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Shui, Y.M. et al. 40782 (KUN) | |
Jinyunshan, Chongqing, China |
|
|
– | |
Yunnan, China |
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|
Peng 20520 (HAST) | |
Mengla, Yunnan, China |
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Wang, W.G., WWG001 (HITBC) | |
Hekou, Yunnan, China |
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Shui, Y.M. et al. 40778 (KUN) | |
Yunnan, China |
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Y,M,Shui et al.D-33(KUN) | |
Jawa, Lesser Sunda Is. |
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|
– | |
Guangxi, China |
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Y,M,Shui et al. B2005-061(KUN) | |
Longzhou, Guangxi, China |
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Xin Xin Feng, et al. 835307 ( |
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Tianlin, Guangxi, China |
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Tian, D.K., Li, C. TDK774 ( |
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Hekou, Yunnan, China |
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– | |
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– | |||
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– | |||
Meinvfeng, Leshan, Sichuan, China |
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Tian, D.K., et al. TDK2243 ( |
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Fanchenggang, Guangxi, China |
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Tian, D.K., et al.TDK2269( |
|
Socotra |
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– | |
Malipo, Yunnan, China |
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– | |
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– | |||
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– |
We chose 17 species from sect.
Habitat and morphology of
Distribution of
Perennial evergreen herb, monoecious, 15–30 cm tall.
Currently known from four localities in Longzhou County and Daxin Countym Guangxi, China. It usually grows on rocks or rock cracks in limestone under forest.
Flowering September-October, fruiting October-December.
The specific epithet “
There are three populations with approximately 1000 individuals found in Longzhou County. Another one population with approximately 500 individuals is distributed in the Encheng National Nature Reserve, Daxin County. Some plants of this begonia are over-collected and sold in the local medicinal herb market of Longzhou County. According to the IUCN Red List Categories and Criteria (
The aligned matrix of the
Bayesian Inference of the phylogenetic position of the newly-described
The nodes with bpp < 0.50 have been collapsed. Sectional placement of taxa is indicated by the following abbreviations: Coe (
The new begonia with 2-loculed ovary, axillary placentation and bifid placentae can be clearly assigned to
Morphological comparison of
Character |
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asymmetric, widely ovate | nearly symmetric, widely ovate to cordate | nearly symmetric, orbicular, 3–4 lobed | asymmetric, narrowly oblique-ovate |
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asymmetric, oblique-cordate | nearly symmetric, obtuse | nearly symmetric, cordate | asymmetric, oblique-cordate |
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irregularly serrulate | minutely serrulate | minutely serrulate | usually almost entire or occasionally crenate |
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ovate-oblong, 50 × 30 mm, glabrous, apex acuminate | elliptic to ovate-oblong, 7–9 × 4–5 mm, glabrous | subglabrous, caduceus | triangular, 6–8 × 3–5 mm, glabrous |
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usually 5, rarely 6 | usually 5, rarely 6 | 5 | usually 4, rarely 6 |
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April-May; May-July | February-March; March-May | July-August; August-October | September-October; October-December |
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700–1500 m alt., limestone, Yunnan; Vietnam | 100–700 m alt., limestone, Yunnan | 430 m alt., limestone, Yunnan | 263 m alt., limestone, Guangxi |
In
In
According to the phylogenetic tree, based on
For the flowering time,
This study was supported by the Guangdong Rural Revitalization Strategic Foundation (20211800400042), the Dongguan Municipal Project for Improvement of Social Science and Technology (2020507101165; 2016108101018), the Dongguan Sci-tech Commissioner Program (Grant No. 20221800500042) and the Guangzhou Science and Technology Program (201903010076). We are also grateful to the editor, the reviewers and the English corrector for improving our manuscript.