中文摘要：

对采自贵州省纳雍县大坪箐的290份苔藓植物标本进行整理和鉴定，结果表明：该区苔藓植物资源非常丰富，共有43科75属157种（包括亚种、变种），而且单种科、单种属在植物组成中所占比例较大，分别占总科数的32．56％、总属数的49．33％。在科属组成中，优势科有青藓科、真藓科和指叶苔科等，优势属有青藓属、绢藓属和合叶苔属等；区系成分复杂，分布交错，可划分为12种类型。其中，以温带成分、热带成分以及东亚成分为主，分别占总数的29．25％、32．65％和27．21％，中国特有成分也占一定的比例，为10．20％。

英文摘要：

Totally, 290 bryophyte specimens were collected and identified from Dapingqing, Nayong County, Guizhou Province in present work. The results showed that a total of 157 species （ including subspecies, vari- ation） are obtained, which belong to 75 genera in 43 families. Interestingly, oligotypic family and genera consisted of the larger proportion, which account for 32. 56% of all families and 49. 33% of all genera. According to the checklist, the dominant families are Brachytheciaceae, Bryaceae and Lepidoziaceae ete, and the dominant genera are Brachythecium, Entodon and Scapania etc. The geographical elements are complex and 12 types of the Bryoflora in this region were recognized. The Tropical, Petrophytia and East Asia elements were dominant, accounting for 29.25% , 32.65% and 27.21% of the total, respectively. The proportion of bryophyte endemic to China was 10. 20%.