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Issue: Vol. 678 No. 1: 23 Dec. 2024
Type: Article
Published: 2024-12-23
DOI: 10.11646/phytotaxa.678.1.1
Page range: 1-16
Abstract views: 30
PDF downloaded: 2

Cytotaxonomic study of the fern genus Lepisorus (Polypodiaceae) from China

Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization, Chengdu Institute of Biology, Chinese Academy of Sciences, P.O. Box 416, Chengdu, Sichuan 610041, China. University of Chinese Academy of Sciences, Beijing 100049, China.
School of Ecology and Environmental Science, Yunnan University, Kunming, Yunnan 650091, China
Key Laboratory for Regional Plants Conservation and Ecological Restoration of Northeast Jiangxi, College of Life Science, Shangrao Normal University, Shangrao, Jiangxi, 334001, China
Lushan Botanical Garden, Chinese Academy of Sciences, Jiujiang, Jiangxi 332900, China
Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization, Chengdu Institute of Biology, Chinese Academy of Sciences, P.O. Box 416, Chengdu, Sichuan 610041, China
Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization, Chengdu Institute of Biology, Chinese Academy of Sciences, P.O. Box 416, Chengdu, Sichuan 610041, China. Missouri Botanical Garden, 4344 Shaw Blvd., St. Louis, MO 63110, U.S.A.
Chromosome number Lepisorus polyploidy systematics Pteridophytes

Abstract

A cytotaxonomic study is conducted for Lepisorus from eastern, southern, and southwestern China, involving 120 samples of about 26 species in seven sections. The chromosome numbers of 10 species are reported for the first time. The basic chromosome numbers, x = 19 and x = 22 discovered in L. cespitosus and L. lineariformis, respectively, are found to be new base numbers in Lepisorus. The taxonomic implications of the chromosome information of some species and the evolution of chromosomes in the genus are discussed.

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