Monochoria vaginalis var. angustifolia，a new variety of the Pontederiaceae from Thailand

Monochoria vaginalis var. angustifolia，a new variety of the Pontederiaceae from Thailand

WANG Guang-Xi, LI Wei, WAN Xiao-Chun, Misako ITO

Journal of Systematics and Evolution . 2003, (6): 569 -572 .