台灣菝葜科的新紀錄植物－－短柱土茯苓

Heterosmilax septemnervia F. T. Wang & Tang (Smilacaceae) a Newly Recorded Plant to Taiwan

土茯苓屬爲菝葜科植物，台灣植物誌第二版記錄3種，最近我們在中部植物調查時發現另一新紀錄植物－－短柱土茯苓；短柱土茯苓雄花有雄蕊7-9枚，屬於多蕊組植物，台灣原有紀錄的多蕊組植物只有台中假土茯苓，其雄蕊幾乎完全離生；而短柱土茯苓雄蕊基部1/3到1/2爲合生蕊柱。本文章提供該種的形態描述與彩色圖片。

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.