Scientific name: Ophiopogon hayatae (N.Tanaka) N.Tanaka, Aver. & T.
English name:
Vietnamese name: Cao cẳng lá dẹt
Other name: O. platyphyllus Merr. & Chun var. hayatae N.Tanaka;

Ophiopogon hayatae (N.Tanaka) N.Tanaka, Aver. & T.Koyama 2015, Adansonia 37, 1: 30. – O. platyphyllus Merr. & Chun var. hayatae N.Tanaka, 2001, Journ. Jap. Bot. 76, 1: 14.

Described from northern Vietnam (“Vietnam. Tonkin, Tamdao”).

Type (“28.VII.1917, B. Hayata s.n.”) TI (holotype!, isotype!).

Distribution 

Vietnam: provinces Vinh Phuc (Tam Dao district) and Thanh Hoa (Thuong Xuan district). Endemic of northern Vietnam. Habitat, phenology and conservation status. Primary broad-leaved evergreen humid submontane forests on granite, rhyolite and shale at elevations 1000–1200 m a.s.l., usually on rich soils in shady places of small depressions along ridge edges.

Flowers in September– November.

Locally very common.

IUCN Red List status tentatively assessed as LC.