本文報導於北部低海拔山區發現的植物：無芒山澗草 (Chikusichloa mutica Keng)，山澗草屬 (Chikusichloa Koidz.) 為臺灣新紀錄屬。山澗草屬小穗兩性，小花具長柄僅有一枚雄蕊，可與台灣產其他五屬稻亞科(Oryzoideae)植物區分。本文提供無芒山澗草描述、線繪圖、照片及台灣分佈圖。

Chikusichloa mutica Keng, a native species of the Poaceae within Malesia and mainland China, was recently found at low elevations of northern Taiwan, providing a new record for this species and the genus for the flora of Taiwan. Chikusichloa Koidz. can be easily distinguished from the other five genera of the subfamily Oryzoideae by its bisexual spikelets, stipitate florets, and only one stamen per floret. Herein, the authors provide a line drawing, photographs, distribution map, and description of Chikusichloa mutica.