Scientific name: Ophiopogon hayatae (N.Tanaka) N.Tanaka, Aver. & T.English name: Vietnamese name: Cao cẳng lá dẹtOther 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!).
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.