帕米尔木灵藓和细齿木灵藓(木灵藓科)的形态特征及其在中国的新分布

Morphological Characters of Orthotrichum pamiricum and O. scanicum (Orthotrichaceae,Musci) and Their New Distribution in China

该文报道了采自新疆的木灵藓属中国2个新记录种——帕米尔木灵藓(Orthotrichum pamiricum)和细齿木灵藓(O.scanicum)。帕米尔木灵藓的识别特征为:叶尖钝,气孔隐型,多着生于孢蒴下部,外齿层齿片8对,干燥时蒴齿背曲,内齿层蒴条16,上部内曲;细齿木灵藓的识别特征为:叶尖部具细齿,气孔半隐型,蒴帽具分散的透明毛,内齿层和外齿层均16片,具8条黄色细沟,干燥时中部以上具沟。对这2种藓类的形态特征、生境和地理分布及与其相似种的形态学进行了比较分析,并绘制了每种的形态结构墨线图。木灵藓属植物在中国的新分布记录进一步表明,新疆地区富含生物多样性,并与中亚植物区系存在密切关系。

Two species from Xingjiang,Orthotrichum pamiricum and O.scanicum,are reported from Xingjiang in the study.Among them,O.pamiricum has obtuse apex of leaves,stomtata immersed,at below the middle part of urn,outer layer of eight pairs of teeth reflexed when dry;and inner peristome segments 16.On the other hand,the main characters of O.scanicum has crenulate leaf apex,stomata semi-immersed,calyptra with a few hyaline hairs,and both peristome teeth and peristome segments 16,with 8 fine furrows.The morphological characters,habitat and geographical distribution,and morphological comparison with related species of them are discussed.The illustrations of each species are provided.The distribution of the two new species in China of Orthotrichum further indicates the rich biodiversity of Xingjiang,China,as well as the close bryoflora relationships between Xingjiang and Central Asia.