臺灣產栒子屬（薔薇科）一新種：清水山栒子

A new species Cotoneaster chingshuiensis (Rosaceae) from Taiwan

本文報導臺灣產栒子屬（Cotoneaster）一新種：清水山栒子（C. chingshuiensis Kun C. Chang & Chih C. Wang），並提供形態描述、手繪圖、花果照片及花粉的掃瞄式電子顯微鏡照片以供辨識。本種主要分布於臺灣北部太魯閣國家公園清水山海拔2,100公尺之山區。本種形態近似小西氏栒子（C. konishii Hayata），但本種的花序10-3朵花，花梗較短（0.5-1.5 mm）、葉較小（6-28×4-15 mm）及葉背密被淡黃色長柔毛可與之區分。

Cotoneaster chingshuiensis Kun C. Chang & Chih C. Wang, a new species from Taiwan is described. A taxonomic treatment, line drawings, color photos, and SEM micrographs of pollen are also provided in the paper. Cotoneaster chingshuiensis is found at Mt. Chingshui of Taroko National Park, at 2,100 m altitude in Northern Taiwan. It is similar to C. konishii Hayata, but can be distinguished by the 1-3-flowered inflorescence, shorter pedicels (0.5-1.5 mm), smaller leaves (6-28 × 4-15 mm) and the lower surface of leaf with densely yellowish villus.