新歸化的臺灣禾草－－大穗孔穎草

Bothriochloa macera (Steud.) S.T. Blake, a Newly Naturalized Grass (Poaceae) in Taiwan

近日於中臺灣發現新歸化物種：大穗孔穎草，該物種可依據小穗外穎顯著圓孔構造與其他孔穎草屬物種區別。本文提供此物種描述、手繪圖以及臺灣孔穎草屬之檢索表供鑑定。

A newly naturalized grass species, Bothriochloa macera (Steud.) S. T. Blake, was found in central Taiwan recently. This species can be easily distinguished from the native Bothriochloa species by the obvious circular pit on the lower glume. The key to species of the genus Bothriochloa and a description of this newly naturalized grass with line drawing for identification are provided in this article.