N. Vietnam, Prov. Thai Nguyen, distr. Dai Tu, vicinities of Tam Dao town, NE macroslope of Tam Dao ridge at 950-1000 m alt. (N 21°27′ E 105°38′). Closed wet evergreen broad-leaved primary forest on very steep mt slope. Terrestrial and epilitic ephemeroid herb on shadow steep rocky slopes. Inflorescence stalk about 1.2 m lg with whitish spots. Spathe light green, flowers white. Tuber spheroid, about 15 cm in diam. Rare.
VH 5054 31.05.1997
International Botanical Expedition of the U.S.A. National Geographic Society (grant No 5803-96)