Difference between revisions of "Cyperus subg. Pycreus"
Carices North. U. S., 517. 1847.
Basionym: Undefined subg. Pycreus Palisot de Beauvois Fl. Oware 2: 48. 1816
Synonyms: Cyperus sect. Pycreus (Palisot de Beauvois) Grisebach
Treatment appears in FNA Volume 23.
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|name=Undefined subg. Pycreus | |name=Undefined subg. Pycreus | ||
|authority=Palisot de Beauvois | |authority=Palisot de Beauvois | ||
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|publication_title=Fl. Oware | |publication_title=Fl. Oware | ||
|publication_place=2: 48. 1816 | |publication_place=2: 48. 1816 | ||
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|name=Cyperus sect. Pycreus | |name=Cyperus sect. Pycreus | ||
|authority=(Palisot de Beauvois) Grisebach | |authority=(Palisot de Beauvois) Grisebach | ||
| + | |rank=section | ||
}} | }} | ||
|hierarchy=Cyperaceae;Cyperus;Cyperus subg. Pycreus | |hierarchy=Cyperaceae;Cyperus;Cyperus subg. Pycreus | ||
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name=Cyperus subg. Pycreus | name=Cyperus subg. Pycreus | ||
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|authority=(Palisot de Beauvois) J. Carey | |authority=(Palisot de Beauvois) J. Carey | ||
|rank=subgenus | |rank=subgenus | ||
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|publication year=1847 | |publication year=1847 | ||
|special status= | |special status= | ||
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|genus=Cyperus | |genus=Cyperus | ||
|subgenus=Cyperus subg. Pycreus | |subgenus=Cyperus subg. Pycreus | ||
Latest revision as of 20:39, 5 November 2020
Culms and leaves with Kranz (chlorocyperoid) anatomy. Inflorescences: spikes; rachilla persistent, wingless or nearly so. Spikelets borne in loosely spicate to ± digitate clusters; floral scales deciduous, 2-keeled or folded. Flowers: stamens (1–)2–3; pistils 2; stigmas 2. Achenes biconvex or ± cylindric, laterally compressed, edge borne toward rachilla.
Discussion
Species ca. 100 (11 in the flora).
Laterally compressed, biconvex achenes, a feature not occurring elsewhere in the family, distinguish Cyperus subg. Pycreus. The taxon has been treated as a genus in Flora Mesoamericana (C. D. Adams 1994), an idea that may have merit.
Selected References
None.