FLORA OF VIETNAM Psilotaceae Psilotum nudum (L.) P.Beauv.
N. Vietnam, Thai Nguyen prov., Vo Nhai distr., Than Sa municipality, vicinities of Kim Son village (N 21°48′ E 105°54′), 23.3 km to 18° of Thai Nguyen city. Primary dry broadleaved evergreen forest on very steep rocky slopes of remnant karst limestone ridge at elev. about 100-150 m a.s.l. Lithophytic forb up to 0.4 m hg on shady rocks. Not common.
NTH 3839 24 Oct. 1999 Det Peter J. Edwards 23/02/2005