Flora of Lycophytes and Ferns in Northeast China

doi:10.7525/j.issn.1673-5102.2022.03.001

Abstract

Abstract:

Northeast China is the richest area of lycophytes and ferns in northern China， and systematic study on its flora is the basis and premise of regional lycophyte and fern resource management. In this study， based on literature analysis and specimen review， the flora and characteristics of lycophytes and ferns in Northeast China were explored. The results showed that： ①There were 141 taxa（species and intraspecific taxa）， which belonged to 48 genera of 19 families. ②The flora of lycophytes and fern in Northeast China was temperate， with ancient tropical origins and cold zone components， which indicated the complexity of its geographical composition. ③Predominant families and genera were obvious： the number of species in seven dominant families accounted for 63.83% of the total number of species， and six dominant genera for 46.10%. There were also many monotypic genera and oligotypic genera with two or three species， accounting for 83.33% of the total number of genera， but 47.52% of the total number of species. ④Northeast China was an important distribution area of Equisetaceae in China. ⑤A total of 30 Chinese endemic species of lycophytes and ferns were distributed in Northeast China， of which four species were endemic to Northeast China（Huperzia asiatica， Athyrium yokoscense var. kirismaense， Deparia pycnosora var. longidens and Parathelypteris changbaishanensis）. This study provided a necessary supplement to the study of flora in Northeast China， and had important theoretical and practical significance.

Key words: lycophytes and ferns, dominant families and genera, geographical composition, temperate, endemic

CLC Number:

S792.22

Yan LI, Wei CAO, Huan HE, Yue ZHANG, Daoyan SU, Wei CHEN. Flora of Lycophytes and Ferns in Northeast China[J]. Bulletin of Botanical Research, 2022, 42(3): 321-328.

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