Covallariaceae

Tuyen Quang Prov., Na Hang Distr., Sinh Long Commune, Khuoi Phin Vill., Long Son mount. Around point 22037' 21.6" N, 105020' 16.7" E, 1300 m a. s. l. Primary evergreen humid forest on rocky limestone mixed sand stone on with brown- red soil hills at elevation 1200 – 1300 m a.s.l. Herb 70 cm in height, 08 Oct, 2917 CPC 8436; DNA, living plant.

Coll.: N.T.Hiep, N.S.Khang, C.Q.Ngan, N. Q. Hieu, B.V. phat, B. V. Dan

Herbarium and photos prepared in 24.12 2020. Flowers dark violet, anthers pale yellow, L. Averyanov, T. Maisak, CPC 8436, AL 396d.2, GN 17542