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Morphological and molecular studies support the recognition of three alpine species within the traditional concept of Brachythecium cirrosum, which requires the resurrection of two earlier described taxa, B. funkii and B. japygum, comb. nov., from synonymy. According to nuclear and chloroplast sequence data, the latter two taxa proved to be closely related to B. tommasinii and B. tenuicaule, whereas the affinities of B. cirrosum within Brachythecium are rather unclear. B. funkii is a coarser plant than B. cirrosum and also differs in shorter leaf acumens and much larger lamina cells. On the other hand, B. japygum (better known under the illegitimate name Eurhynchium histrio) can be distinguished from B. cirrosum in the prostrate and densely pinnate to subdendroid growth form, longer leaf acumens and wider lamina cells with lumens wider than walls. All three species also differ from each other in the morphology of the alar cell group. Despite their shared preference for calcareous rocks, the three species show marked differences in habitat requirements.  相似文献   
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通过对青藓科模式标本的研究,结合中科院华南植物园标本馆(IBSC)及云南高黎贡山的青藓科标本,报道中国青藓科新记录1种:阔叶美喙藓Eurhynchium latifolium Cardot。对于曾有文献记载但缺少描述的4个种:粗肋毛尖藓Cirriphyllum crassinerum(Taylor) Loeske &M.Fleisch.、锐尖细喙藓Rhynchostegiella menadensis(Sande Lac.) E.B.Bartram、毛尖细喙藓Rhynchostegiella sakuraiiTakaki和西里伯长喙藓Rhynchostegium celebicum(Sande Lac.) A.Jaeger,在经过模式标本的检阅后重新确定了其在中国的分布,并提供了详细的描述及图片。  相似文献   
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