Heliacria gen. nov. (Scutellarioideae, Lamiaceae) from Coastal Southern Vietnam

Abstract:

Heliacria Bo Li, C.L. Xiang, T.S. Hoang & Nuraliev and H. maritima Bo Li, C.L. Xiang, T.S. Hoang & Nuraliev, a new genus and a new species of Scutellarioideae (Lamiaceae) endemic to coastal areas of south-central Vietnam, are described and illustrated. Heliacria is distinct from the other five genera of Scutellarioideae by having climbing habit, large flowers with pure white corolla, sub-actinomorphic calyx with five long lobes which are accrescent and spreading in fruits, and nutlets radially tuberculate at apex. The genus is currently only known from four provinces of Vietnam (Binh Dinh, Phu Yen, Khanh Hoa, and Ninh Thuan).

Key words:New taxa;Endemic genus;Holmskioldia;Hymenopyramis;Lamiales