Polypodiaceae s.l.

Lemmaphyllum sp.

Bac Kan Province, Ba Be District, Cao Thuong Community, Ba Be National Park. Primary and old secondary evergreen broad-leaved forest on very steep rocky slopes composed by white crystalline marble-like highly eroded limestone around point 22º27’20’’N 105º36’06’E at elevation of about 750 m a.s.l. Creeping epiphytic fern on mossy tree in humid wet place along ridge edge above vertical cliff. Locally common.

23 April 2024, Nguyen Huu Cuong, Chu Ngoc Quan, L. Averyanov, T. Maisak, AL2837.