Abstract
The genus Heterosmilax (Smilacaceae) is comprised of about 11 species in the world of which three species were recorded in the 2(superscript nd) edition of Flora of Taiwan. In the course of our plant inventory of Taiwan, Heterosmilax septemnervia F. T. Wang & Tang, heretofore unknown in Taiwan, was collected from the central mountain range of this island. It is closely related to H. seisuiensis by the staminate flower with 7-9 stamens (a feature of section Polyandrae). However, the two species are distinguishable by the stamen that are almost free for H. seisuiensis but fused 1/3 to 1/2 at base for H. septemnervia. We provide a taxonomic account of H. septemnervia, as a new distributional record in Taiwan as well as colored photographs taken from the wild to aid in identification.
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