FLORA OF VIETNAM
Polypodiaceae s.l.
Osmunda sp. s.l.

Son La Prov., Yen Chau Distr., Muong Lum Municipality, Xao village, around point 20°59′54″N 104°38′47″E.

Broad-leaved and coniferous (with Pinus kwangtungensis and Calocedrus rupestris) evergreen forest on steep slopes and on tops of ridge composed with rocky crystalline solid marble-like highly eroded limestone at elev. 1100-1300 m a.s.l.

Terrestrial fern on shady slope. Locally common.

HAL 9523 04 Nov. 2006
Coll.: Nguyen Tien Hiep, L.Averyanov, Pham Van The.