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Issue: Vol. 671 No. 1: 7 Nov. 2024
Type: Article
Published: 2024-11-07
DOI: 10.11646/phytotaxa.671.1.6
Page range: 98-104
Abstract views: 253
PDF downloaded: 10

Begonia laxiflora (Begoniaceae), a new species in sect. Petermannia from Central Vietnam

Institute of Ecology and Biological Resources, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi-10072, Vietnam. Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi-10072, Vietnam.
Institute of Ecology and Biological Resources, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi-10072, Vietnam. Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi-10072, Vietnam.
Forestry Inventory and Planning Institute, Ngoc Hoi road, Vinh Quynh commune, Thanh Tri district, Hanoi, Vietnam
Department of Botany, Faculty of Pharmacognosy and Traditional Medicine, Hanoi University of Pharmacy, 13-15 Le Thanh Tong street, Hoan Kiem, Hanoi, Vietnam
World Wide Fund For Nature – Vietnam, No. 6, Lane 18 Nguyen Co Thach street, Cau Dien ward, Nam Tu Liem district, Hanoi, Vietnam
Dakrong Nature Reserve, Km 10, National road number 14, Ta Long commune, Dakrong district, Quang Tri, Vietnam
Dakrong Nature Reserve, Km 10, National road number 14, Ta Long commune, Dakrong district, Quang Tri, Vietnam
Herbarium of Taiwan Forestry Research Institute, Taiwan Forestry Research Institute, No. 53, Nan–Hai Road, Taipei 100, Taiwan
Central Truong Son Dakrong Nature Reserve endemism Quang Tri province plant diversity plant taxonomy Eudicots

Abstract

Begonis laxiflora is described as a new species endemic to Vietnam from granite boulder habitats in the Dakrong district. It is most similar to B. abbreviata in its creeping habit, broadly ovate leaves, persistent bracts, and the number of tepals in both staminate and pistillate flowers. The new species is different in its inflorescence having internodes much longer than the bracts (vs. internodes are hidden by the bracts), the outer tepals glabrous in both staminate and pistillate flowers (vs. sparsely scabrescent on the abaxial surface), ovary covered with minutely glandular trichomes (vs. hirsute) and the wings of the capsule distally pointed (vs. rounded).

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