Systematic Revision and Phylogeny of Paspalum Subgenus Ceresia (Poaceae: Panicoideae: Paniceae)

Twenty-five species are treated in this work, in which exomorphological characters are analyzed cladistically. Species of Paspalum subg. Ceresia are characterized by their rigid, filiform to lanceolate blades, inflorescences with one to several racemes, rachis of the racemes winged and hyaline to me...

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Bibliographic Details
Published in:Annals of the Missouri Botanical Garden 2002-01, Vol.89 (3), p.337-399
Main Authors: Denham, Silvia S., Fernando 0. Zuloaga, Morrone, Osvaldo
Format: Article
Language:English
Subjects:
Glumes
Hair
Holotypes
Hyalin
Inflorescences
Internodes
Isotypes
Ligules
Nerves
Spikelets
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Summary:Twenty-five species are treated in this work, in which exomorphological characters are analyzed cladistically. Species of Paspalum subg. Ceresia are characterized by their rigid, filiform to lanceolate blades, inflorescences with one to several racemes, rachis of the racemes winged and hyaline to membranous, spikelets pilose, occasionally glabrous, with the upper anthecium pale, hyaline to membranous, occasionally chartaceous, and the upper lemma not enclosing the tip of the upper palea. Species grow in South America from Mexico to Argentina and Uruguay. A cladistic analysis of subgenus Ceresia was conducted to test its monophyly, and to establish its relationship with other groups of Paspalum. A key to the species in subgenus Ceresia is given, as well as morphological description and illustration, and distribution maps.
ISSN:0026-6493
DOI:10.2307/3298599