Loxostigma puhoatense (Gesneriaceae), a new species from North Central Vietnam

Ngọc-Sâm Lý; Danh-Hùng Nguyễn; Thị-Hương Lê; Minh-Hợi Trần; Ngọc-Đài Đỗ; Bá-Vương Trương; Stephen Maciejewski

doi:10.3897/phytokeys.151.49473

Loxostigma puhoatense (Gesneriaceae), a new species from North Central Vietnam

PhytoKeys. 2020 Jun 12:151:49-57. doi: 10.3897/phytokeys.151.49473. eCollection 2020.

Authors

Ngọc-Sâm Lý^{1

2}, Danh-Hùng Nguyễn², Thị-Hương Lê³, Minh-Hợi Trần⁴, Ngọc-Đài Đỗ^{2

5}, Bá-Vương Trương¹, Stephen Maciejewski⁶

Affiliations

¹ Institute of Tropical Biology, Vietnam Academy of Science and Technology (VAST), 85 Tran Quoc Toan, District 3, Ho Chi Minh City, Vietnam Graduate University of Science and Technology Hanoi Vietnam.
² Graduate University of Science and Technology, VAST, 18 Hoang Quoc Viet, Cau Giay District, Hanoi, Vietnam Institute of Tropical Biology, Vietnam Academy of Science and Technology Ho Chi Minh Vietnam.
³ School of Natural Science Education, Vinh University, 182 Le Duan, Vinh City, Nghe An Province, Vietnam Vinh University Vinh Vietnam.
⁴ Institute of Ecology and Biological Resources, VAST, 18 Hoang Quoc Viet, Cau Giay District, Hanoi, Vietnam Institute of Ecology and Biological Resources Hanoi Vietnam.
⁵ Nghe An College of Economics, 51 Ly Tu Trong, Vinh City, Nghe An Province, Vietnam Nghe An College of Economics Vinh Vietnam.
⁶ The Gesneriad Society, Inc., 1122 East Pike Street, PMB 637, Seattle, Washington, USA The Gesneriad Society Seattle United States of America.

Abstract

Loxostigma puhoatense N.D. Do et al., sp. nov., a new species of Gesneriaceae, is described and illustrated from Pu Hoat Nature Reserve, Nghe An Province, Vietnam. This species is morphologically similar to L. dongxingensis and L. damingshanensis in the plant habit, indumentum system of vegetative and reproductive characters, shape of leaf blades, calyx, pistil but differs from the latter two by the abaxially reddish-purple leaf blade with pubescent along veins, lateral veins 11-19, shorter white to pale yellowish-white corolla (3.7-3.8 cm long) with purple-spotted and glabrous inside, longer abaxial stamens in 2-2.1 cm, shorter and densely glandular-puberulent ovary in 1-1.2 cm, and sparsely glandular-puberulent style. Data on distribution, ecology, phenology, and vernacular of the new species are provided.

Keywords: Briggsia; Didymocarpus; Gesneriaceae; Loxostigma; Vietnam; taxonomy.

Ngọc-Sâm Lý, Danh-Hùng Nguyễn, Thị-Hương Lê, Minh-Hợi Trần, Ngọc-Đài Đỗ, Bá-Vương Trương, Stephen Maciejewski.