FLORA OF VIETNAM
Lamiaceae

N. Vietnam, prov. Ha Giang, distr. Dong Van, municipality Ho Quang
Phin, vicinities of Ta Xa village, 14-16 km to SSW of Dong Van town (N
23°16′ E 105°22′). Primary very wet mossy cloud mixed forest (with
domination of Tsuga chinensis and Pinus kwangtungensis) along tops of
karst remnant limestone ridge at 1550-1600 m elev. Lithophyte herb on
vertical cliffs. Leaves above deep green with white venation, deep
purple-violet below. Flowers deep blue-violet. Very common.

CBL 1764 28 April 1999

International Botanical Expedition of the U.S.A. National Geographic
Society (grant No 6300-98)

Collectors: P.K.Loc, P.H.Hoang, Averyanov L.