FLORA OF VIETNAM
Polypodiaceae s.l.
Polystichum 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.

Lithophytic fern on shady rocky slope along ridge edge. Occasional.

HAL 9516 04 Nov. 2006
Coll.: Nguyen Tien Hiep, L.Averyanov, Pham Van The.