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Issue: Vol. 600 No. 1: 19 June 2023
Type: Article
Published: 2023-06-19
DOI: 10.11646/phytotaxa.600.1.3
Page range: 16-24
Abstract views: 519
PDF downloaded: 21

Begonia saxifragoides sp. nov. and two new records of Begonia (Begoniaceae) from northern Vietnam

Department of Silviculture Foundation and Forest Phytodiversity, Silviculture Research Institute, Vietnamese Academy of Forest Sciences, 46, Duc Thang Ward, Bac Tu Liem, Hanoi, Vietnam.
Department of Silviculture Foundation and Forest Phytodiversity, Silviculture Research Institute, Vietnamese Academy of Forest Sciences, 46, Duc Thang Ward, Bac Tu Liem, Hanoi, Vietnam.
Department of Silviculture Foundation and Forest Phytodiversity, Silviculture Research Institute, Vietnamese Academy of Forest Sciences, 46, Duc Thang Ward, Bac Tu Liem, Hanoi, Vietnam.
Forest Research Centre, Southern Cross University, Military Rd, Lismore, NSW, Australia.
Forest Research Centre, Southern Cross University, Military Rd, Lismore, NSW, Australia.
Herbarium of Taiwan Forestry Research Institute, Taiwan Forestry Research Institute, No. 53, Nan–Hai Road, Taipei 100, Taiwan.
biodiversity endemism Indochina limestone taxonomy Eudicots

Abstract

Surveys in montane forests in northern Vietnam have revealed one new species and two new records of Begonia. The new species, B. saxifragoides resembles B. minhaniae but is distinguished by the orbicular to reniform (vs. broadly ovate) leaves with rounded (vs. acute to acuminate) apex, the petioles densely covered with pilose or villous (vs. subappressed tomentose), ovary trigonous-globose (vs. trigonous-ellipsoid) and wings pilose or glandular hairs (vs. glabrous or sparsely tomentose). The newly recorded species from Vietnam were B. laotica Y.H.Tan & H.B.Ding previously known from Laos, and B. adscendens C.B.Clarke from India, Myanmar and Laos.

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