Abstract

A new species, Scutellaria austrotaiwanensis Hsieh & Huang from south Taiwan is described. This new species is similar to S. playfairi Kudo, but can be distinguished by its smaller leaves with 4 to 5 shallow crenations on the margins and the nutlet coat with short grappling-hook tuberculae.This new species differs from S. luzonica Rolfe by its rugulate-reticulate to reticulate and microperforate versus rugulate exinal ornamentation. This species is found on steep slopes between 400 and 500 m in Machilus dominated forest in south Taiwan. SEM micrographs of pollen grains and nutlets, and a chromosome number 2n=26 are provided.

中文摘要

本文描述黃芩屬一新種，南台灣黃芩(Scutellaria austrotaiwanensis Hsieh & Huang)。本種近似布烈氏黃芩 (S. playfairi Kudo)，但其具有較小的葉子，葉緣具 4-5 個淺圓齒，小堅果具短鉤狀突起，後者葉子較大，葉緣具 5-9 個鋸齒，小堅果具平滑瘤狀突起，足以區別。呂宋黃芩(S. luzonica Rolfe) 長期以來被認為和省產的前二者植物有密切的關係，本文經由花粉的比對認為其與本省的此二者植物為不同的種。本種見於台灣南部位於海拔 400 至 500 公尺之楠木林陡坡上。本種之花粉形態、小堅果表皮微細構造及染色體數目 2n=26 均為首次報導。 關鍵詞：南台灣黃芩，花粉，小堅果，分類，台灣。

Keyword: Scutellaria austrotaiwanensis, Pollen, Nutlet, Taxonomy, Taiwan.