subgeneric classification of Clematis (Ranunculaceae) in temperate North America north of Mexico

Within North America north of Mexico, Clematis (Ranunculaceae) consists of 30 native or introduced species which are classified into four subgenera, viz., Clematis (9 species), Atragene (L.) Torrey & Gray (2 species, Viorna A. Gray (17 species), and Viticella (Moench) Keener & Dennis, stat....

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Bibliographic Details
Published in:Taxon 1982-02, Vol.31 (1), p.37-44
Main Authors: Keener, C.S, Dennis, W.M
Format: Article
Language:English
Subjects:
Biological taxonomies
Bisexuality
Botany
Calyx
Genera
Herbs
Leaves
Plants
Stamens
Taxa
Temperate Zone
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Summary:Within North America north of Mexico, Clematis (Ranunculaceae) consists of 30 native or introduced species which are classified into four subgenera, viz., Clematis (9 species), Atragene (L.) Torrey & Gray (2 species, Viorna A. Gray (17 species), and Viticella (Moench) Keener & Dennis, stat. nov. (2 species). In particular, the history of the names "Atragene" and "Viorna" is reviewed with special attention to the major infrageneric rank (subgenus) in Asa Gray's publications.
ISSN:0040-0262
1996-8175
DOI:10.2307/1220586