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Project Name Data (Last Modified On 10/22/2012)
 

Flora Data (Last Modified On 10/22/2012)
Genus CENCHRUS L.
PlaceOfPublication Sp. P1. 1049. 1753.
Synonym Rarum Adans. Fam. P1. 2:35, 597. 1763. Cenchropsis Nash in Small, Fl. Southeast. U. S. 109. 1903.
Description Spikelets sessile, enclosed in spiny burs composed of united sterile branches, the burs falling entire, the body of the bur irregularly lobed, the lobes rigid, the spines barbed; spikelets 1 to several in each bur, usually glabrous; first glume narrow, 1-nerved, much shorter than the spikelet, sometimes wanting; second glume and sterile lemma nearly equal, 3- to 5-nerved, the lemma enclosing a palea and usually a staminate flower; fruit indurate, the lemma acuminate, the margins thin, flat.
Note Annuals or perennials with terminal racemes of burs.
Key a. Burs subtended by a ring of slender bristles; spikelets 3 or 4 in each bur. b. Burs not more than 4 mm. wide, densely crowded in a long spike, the lobes interlocking; first glume obsolete - -- 1. C. BROWNII bb. Burs 5-7 mm. wide, not crowded, the lobes usually erect; first glume present --- ----2. C. ECHINATUS aa. Burs not subtended by a ring of slender bristles; spikelets usually 2 in each bur ------- - --- ------------ 3. C. PAUCIFLORUS
 
 
 
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