FLORA OF VIETNAM Araceae Arisaema sp. Ha Giang prov., Quan Ba distr., Bat Dai Son commune, Bat Dai Son Nature Reserve, San Chu village, around point 23º08ʹ55.1ʺN 104º59ʹ45.7ʺE, 1100-1290 m a.s.l., karstic, highly eroded mountains composed of solid marble-like limestone, primary evergreen coniferous humid forest with Pseudotsuga sinensis on rocky mountain tops and ridges. Terrestrial and lithophytic tuberiferous herb in shady rocky place. Petiole and peduncle olive green-white tessellated, spathe light green with white base and center. No female flowers, male light yellowish, inflorescence axis light green. Not rare. 13 April 2018, L. Averyanov, Nguyen Sinh Khang, Chuong Quang Ngan, T. Maisak, VR 049.

All photos © L. Averyanov & K.S. Nguyen