Abstract

The genus Cotoneaster in Taiwan is revised. By comparing fresh flowering specimens and published literature, four species, i.e. C. horizontalis Dcne., C. konishii Hayata, C. morrisonensis Hayata and C. rokujodaisanensis Hayata are recognized in Taiwan. C. horizontalis is a new record. Color photographs of C. horizontalis and C. morrisonensis are provided for the flower color of the former is reddish purple, but the latter is white. SEM micrographs of leaf hairs and pollen grains, a key to species, and taxonomic description are provided.

中文摘要

本文訂正臺灣產舖地蜈蚣屬為 4 種，分別為平枝舖地蜈蚣 (Cotoneaster horizontalis Dcne.)，臺灣舖地蜈蚣 (C. konishii Hayata)，玉山舖地蜈蚣 (C. morrisonensis Hayata) 和樂山舖地蜈蚣 (C. rokujodaisanensis Hayata)。平枝舖地蜈蚣為新記錄種，目前僅發現於南湖大山地區，其與玉山舖地蜈蚣相似，但前者花瓣暗紅色，花瓣直立，及花粉具散條紋 (rugulate ornamentation)和穿孔 (perforation)；而後者花瓣白色，花瓣平展，及花粉具平行條紋 (striate ornamentation) 足資區別。 關鍵字：舖地蜈蚣屬，花粉形態，分類，臺灣。

Keyword: Cotoneaster, Pollen morphology, Taxonomy, Taiwan.