Hemiboeachanii (Gesneriaceae), a new species from limestone areas of northern Vietnam

Cuong Huu Nguyen; Ly Van Nguyen; Khang Sinh Nguyen; Alexander A Egorov; Leonid V Averyanov

doi:10.3897/phytokeys.183.69180

Hemiboeachanii (Gesneriaceae), a new species from limestone areas of northern Vietnam

PhytoKeys. 2021 Oct 22:183:108-114. doi: 10.3897/phytokeys.183.69180. eCollection 2021.

Authors

Cuong Huu Nguyen^{1

2}, Ly Van Nguyen¹, Khang Sinh Nguyen³, Alexander A Egorov⁴, Leonid V Averyanov⁵

Affiliations

¹ Vietnam National University of Forestry, Xuan Mai, Chuong My, Ha Noi, Vietnam Vietnam National University of Forestry Ha Noi Vietnam.
² Saint Petersburg State Forestry University, Institute str., 5, St. Petersburg, 194021, Russia Saint Petersburg State Forestry University St.Petersburg Russia.
³ Institute of Ecology and Biological Resources, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet Road, Nghia Do, Cau Giay, Hanoi, Vietnam Institute of Ecology and Biological Resources, Vietnam Academy of Science and Technology Ha Noi Vietnam.
⁴ St. Petersburg State University, 7-9 Universitetskaya Emb., St. Petersburg, 199034, Russia St. Petersburg State University St.Petersburg Russia.
⁵ Komarov Botanical Institute Russian Academy of Sciences, Prof. Popov str., 2, St. Petersburg, 197376, Russia Komarov Botanical Institute of the Russian Academy of Science St. Petersburg Russia.

Abstract

Hemiboeachanii, a new species of Gesneriaceae from Ha Giang Province, northern Vietnam, is here described and illustrated. It has many branched stems, diamond-shaped involucre with two cirrose opposite apices, a pink corolla, red spotted inside, and a flowering time in January-February. Among congeners with an externally hairy corolla, this new species is morphologically close to H.crystallina and H.sinovietnamica. Diagnostic discriminative characters in all mentioned species are discussed. The conservation status of this species is considered to be "Critically endangered" (CR) according to the IUCN Red List Categories and Criteria.

Keywords: Endemism; New taxon; flora of Vietnam; limestone flora; plant diversity; plant taxonomy.

Cuong Huu Nguyen, Ly Van Nguyen, Khang Sinh Nguyen, Alexander A. Egorov, Leonid V. Averyanov.