8. Raphiocarpus taygiangensis C.H.Nguyen, K.S.Nguyen & Aver. in Nguyen et al. (2023: 21).

Type: — VIETNAM. Quang Nam: Tay Giang District, A Xan Village, 1270 m, around point 15°48’57”N 107°19’47”E, 20 April 2022, C.H.Nguyen et al. CKH 2022042068 (holotype VNF, isotypes HN, LE!)

Distribution:—The species is endemic to Vietnam, known on the basis of the only type collection in Quang Nam Province.

Ecology and phenology:—It grows in evergreen broad-leaved submontane forests on granite and shale at elevations of about 1300 m a.s.l. Flowers in April–May.

Conservation status:—Up to date, only one population of this species is currently known. Considering the small population size (less than 500 mature individuals growing on an area less than 5 km 2) and fragile habitat, the species conservation status was preliminarily assessed as Vulnerable (VU D2) according to the criteria of IUCN 2023 (Nguyen et al. 2023). No additional data become available since this assessment.