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- Title
A phylogenetic evaluation of Panicum sects. Agrostoidea, Megista, Prionilia and Tenera (Panicoideae, Poaceae): Two new genera, Stephostachys and Sorengia.
- Authors
Zutoaga, Fernando O.; Scataglini, M. Amalia; Morrone, Osvaldo
- Abstract
The taxonomic features of species of Panicum, previously classified in Panicum subg. Agrostoidea and Phanopyrum including sects. Ivlegista, Tenera, Prionitia and Agrostoidea, are reviewed and compared with subg. Panicum and other taxa of Paniceae. ll taxa, previously considered in these subgenera and sections, are now included in the new genera Stephostachys and Sorengia, which are based on morphological and molecular characters. Step hostachys includes one species, S. mertensii (Roth) Zuloaga & Morrone, ranging from Mexico to Argentina, while Sorengia comprises seven species, S. anceps (Michx.) Zuloaga & Morrone, S. caricoides (Nees ex Trin.) Zuloaga & Morrone, Sorengia longfolia (Torr.) Zuloaga & Morrone S. petersonii (Hitchc. & Ekman) Zuloaga & Morrone, S. prionitis (Nees) Zuloaga & Morrone, S. stenodes (Griseb.) Zuloaga & Morrone, and S. tenra (Beyr. ex Trin.) Zuloaga & Morrone, distributed from the United States to Bolivia and Brazil. Affinities of the new genera with other genera of Paniceae are discussed. Lectotypes are designated for Panicum caricoides var. glabriusculum Doll, P. caricoides var. pilosum Doll, P. prionitis Nees, P. prionitis var. varium Kuntze, and P. stenodes Griseb.
- Subjects
PANICUM; PLANT phylogeny; PLANT morphology; PLANT species; PARSIMONIOUS models
- Publication
Taxon, 2010, Vol 59, Issue 5, p1535
- ISSN
0040-0262
- Publication type
Article