| Abstract Detail
Pteridology Xu, Xiaogang [1], Zhang, Li-Bing [2]. A revison of the fern genus Pleocnemia (Dryopteridaceae). The circumscription, taxonomy, and phylogeny of the Old World fern genus Pleocnemia Presl (1836) have been confusing. It was often been treated as a member of Tectariaceae, while recent molecular data resolved it as a member of Dryopteridaceae. Many species in Pleocnemia have been transferred to various genera, e.g., Dictyopteris, Tectaria (incl. Aspidium). Different authors recognized various numbers of species in the genus. A taxonomic revision based on literature and herbarium studies shows that the synapomorphies of the genus include: (1) presence of areoles of venation; (2) the unicellular yellow or orange glands; (3) a distorted form of vascular anatomy of stpies; and (4) chromosome n = 41. The important taxonomic features include: presence or absence of sinus-teeth that project out of the plane of a pinnule, and morphology of the unicellular yellow or orange glands. About 23 species are recognized in this revision, of which P. acuminata, P. andaiensis , P. brongniartii, P. conjugata, P. irregularis, P. nesiotica, P. seranensis are mainly distributed in southern part of the areas, and P. winitii, P. hamata, P. kwuangsiensis, P. submembranacea, etc. are mainly distributed in northern part of the areas.
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1 - Nanjing Forestry University, College of Biology and Environment, Nanjing, Jiangsu, 210037, China
2 - Missouri Botanical Garden, P.O.Box 299, St. Louis, Missouri, 63166, USA
Keywords:
taxonomy.
Presentation Type: Oral Paper
Session: 7, Pteridological Section/AFS
Location: 203/Savannah International Trade and Convention Center
Date: Monday, August 1st, 2016
Time: 11:00 AM
Number: 7011
Abstract ID:783
Candidate for Awards:Edgar T. Wherry award |
