Lamiaceae

Plectranthus sp.?

Bac Kan Province, Ba Be District, Ba Be National Park. Dry evergreen broad-leaved secondary forest on cliffs composed by white crystalline marble-like highly eroded limestone along lake shore on point 22º24’58’’N 105º36’48’E at elev. of about 160 m a.s.l. Erect lithophytic herb to 1.5 m tall on exposed rocks. Flowers blue violet. Common on hill tops.

21 October 2023, Nguyen Huu Cuong, Chu Ngoc Quan, L. Averyanov, Nguyen Van Ly, T. Maisak, AL2351.