Equisetaceae Equisetum diffusum Lai Chau Prov., Sin Ho Distr., Phin Ho Mun., Ta Genh vill., around point 22?28′26′' N, 103?16′31′' E, 1285 m. Lower slopes of limestone mountains, on stream banks.
Wet terrestrial. Occasionally common, clustered. HAL 8777 11 Jun 2006 Photos Collectors: P.K. Loc, N.T. Vinh, N.S. Khang, P.N. Quan and L.H. Phong.
Collected with the financial support from the Program of Basic Researchs in Life Sciences, Vietnam.