FLORA OF VIETNAM
Lamiaceae
Microtoena subspicata C.Y. Wu

Ha Giang prov., Quan Ba distr., Tung Vai commune, Thung Pang village, around point 23°04ʹ28.9ʺN 104°55ʹ32.0ʺE, steep rocky slope to large deep cave composed with highly eroded marble-like white limestone at elevation 900–1000 m a.s.l. Secondary evergreen broad-leaved very humid forest with bamboo. Erect herb to 1 m tall among open rocks along trail. Flowers yellow. Not rare. 17 October 2018, L. Averyanov, Nguyen Sinh Khang, T. Maisak, Truong Duc Thieu, VR 959 (HN, LE01054148).