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Issue: Vol. 498 No. 2: 28 April 2021
Type: Article
Published: 2021-04-28
DOI: 10.11646/phytotaxa.498.2.7
Page range: 139–144
Abstract views: 23
PDF downloaded: 1

Begonia rigidifolia ssp. sonhungii (sect. Petermannia, Begoniaceae), a new subspecies from limestone hills in Central Vietnam

Herbarium of Taiwan Forestry Research Institute (TAIF), Taiwan Forestry Research Institute, No. 53, Nan–Hai Road, Taipei 100, Taiwan.
89 Tran Van Du Street, My An Ward, Ngu Hanh Son District, Da Nang City, Vietnam.
89 Tran Van Du Street, My An Ward, Ngu Hanh Son District, Da Nang City, Vietnam.
biodiversity endemic karst region taxonomy Eudicots

Abstract

Begonia rigidifolia Aver. ssp. sonhungii C.W.Lin (sect. Petermannia, Begoniaceae) from Central Vietnam is hereby described and illustrated as new. It resembles B. rigidifolia ssp. rigidifolia, but differs in its very sparsely puberulous (vs. glabrous), darker toned lamina that is embellished with a pale green broad band (vs. emerald green lamina with irregular radiantly arranged dark spots), stamens widely obovate (vs. obovate) and capsule with wider abaxial wing 6–10 mm (vs. 2–3 mm).