纽藓属(丛藓科)中国新记录——节叶纽藓(英文)

A New Record of Tortella alpicola Dix.(Pottiaceae) in China

报道了纽藓属(丛藓科)中国新记录——节叶纽藓(Tortella alpicola Dix.)(新拟)。该种主要分布于北美洲、欧洲和亚洲,在中国为首次记录。该种特征:植物体高约1cm,基部细胞雪白色,叶尖端易断裂且形成若干分节。该文对节叶纽藓的形态特征和地理分布进行了详细描述,将其与折叶纽藓[T.fragilis(Hook.&Wils.)Limpr.]、长叶纽藓[T.tortuosa(Hedw.)Limpr.]和纽藓[T.humilis(Hedw.)Jenn.]进行了比较分析,并提供了该种的图版和中国纽藓属的分种检索表。

Tortella alpicola Dix.（Pottiaceae） is reported as a new record to China.It is distributed in North America,Europe and Asia.This species is characterized as plants reaching to 1 cm hight,leaf base peculiar snow white and caducous leaf tip with several ＂barrel-shaped＂ segments.Morphological characterizations and geographical distribution of T.alpicola are given and confusion with other taxa,such as Tortella fragilis （Hook.＆ Wils.） Limpr.,Tortella tortuosa （Hedw.） Limpr.and Tortella humilis （Hedw.） Jenn.,is discussed.A key to the genus Tortella in China and illustrations of T.alpicola are presented.