Difference between revisions of "Panicum subg. Phanopyrum"
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Revision as of 21:01, 5 November 2020
Plants annual or perennial, if perennial, growth habit various. Culms erect or decumbent, some¬times succulent or robust. Ligules membranous, membranous and ciliate, or lacerate; blades with the vascular bundles surrounded by 2 thick-walled sheaths, outer sheaths parenchymatous, chloroplasts few and unspecialized or absent. Photosynthesis C3. Spikelets ovoid, ellipsoid, or obovoid, glabrous, pilose, or tuberculate. Lower glumes 1/5 - 4/5 as long as the spikelets, usually 3-veined; upper glumes and lower lemmas usually 5-veined (rarely 7- or 9-veined); lower florets sterile or staminate; lower paleas present or absent; upper florets sometimes stipitate, indurate to membranous, smooth and shiny, or rugose, or finely pubescent, or with paired glands, x = 9 or 10, with some polyploids.
Discussion
Panicum subg. Phanopyrum is most abundant in wet forests of warm temperate and tropical regions. In the Western Hemisphere, its range extends from the southern United States through South America.
Selected References
None.