台灣稀有的唇形科植物－－田代氏鼠尾草的再發現

A Rediscovery of Salviata shiroi Hayata (Lamiaceae) from Taiwan

田代氏鼠尾草（Salvia tashiroi Hayata）爲唇形科鼠尾草屬植物，日人田代氏1896年採於屏東縣恆春，此標本並被早田文藏於1919年發表爲新種，此後未有任何採集紀錄；第二版《台灣植物誌》將其列爲未確定種，而在《中國植物志》將其合併爲華鼠尾草之異名。最近於高雄縣六龜鄉十八羅漢山採集到本種，生長於溪谷旁陡坡之開闊地上。本種有單葉和三出複葉兩種形態，此特徵可與台灣本屬其他植物區別。本種與產於中國大陸之華鼠尾草在花部構造和花色上均可區別，應視爲不同的物種。本文描述其分類特徵、生育地和分布，其爲6溝花粉，表面具2層網狀紋飾，並首次報導本種爲二倍體，染色體數目2n=2x=16。

In 1896 a single specimen of Lamiaceae was collected by M. Toshiro from Hengchun in the southern Taiwan. A decade later it was described as Salvia plectranthoides Griff by Matsumura and Hayata in 1906, but redescribed as a new species Salvia tashiroi by Hayata in 1919. For a century, this species has been known only from a single specimen (holotype), and treated as a questionable or uncertaion taxa in the flora of Taiwan, or as a synonym of Salvia chinensis Benth. in the flora of China. In our recent plant inventory survey of Taiwan, we rediscovered its wild populations at Mt. Shih-Pa-Lo-Han, Kaohsiung County in the southern Taiwan. This paper confirms the taxonomic status of Salvia tashiroi and provides it with a detailed redescription with color photographs, pollen SEM microphotographs, chromosome number (2n=16), and distribution in Taiwan.