FLORA OF VIETNAM Convallariaceae Tupistra theana Aver. et N.Tanaka, sp.nov. Type
Quang Binh Prov., Minh Hoa Distr., Hoa Tien municipality, La Van village, around point 17°51′45”N 105°49′45”E.
Highly degraded primary and secondary evergreen broadleaved forest on very steep rocky slopes of remnant limestone hills composed with highly eroded marble-like crystalline limestone at elev. 200-450 m a.s.l.
Lithophytic herb on shelves and in crevices of tall shady vertical cliff near to top of mountain. Flowers dark brownish-violet, anthers light yellow, stigma white with light violet tint. Not common.