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Project Name Data (Last Modified On 10/12/2012)
 

Flora Data (Last Modified On 10/12/2012)
Genus BOUTELOUA
PlaceOfPublication Var. Cienc. 4:134. 1805.
Synonym Atheropogon Muhl. ex Willd. Sp. P1. 4:937. 1806. Triathera Desv. Nouv. Bull. Soc. Philom. (Paris) 2:188. 1810. Heterosteca Desv. Nouv. Bull. Soc. Philom. (Paris) 2:188. 1810. Chandrosium Desv. Nouv. Bull. Soc. Philom. (Paris) 2:188. 1810. Polyodcon H.B.K. Nov. Gen. & Sp. 1:174. 1816. Triaena H.B.K. Nov. Gen. & Sp. 1:178. 1816. Actinochloa Willd. ex Roem. & Schult. Syst. Veg. 2:22, 417. 1817. Eutriana Trin. Fund. Agrost. 161. 1820. Erucaria Cervant. Naturaleza 1:347. 1870.
Description Spikelets few- to several-flowered, with one fertile floret and one or two rudi- mentary florets above it, the second floret often staminate and sometimes perfect; glumes 1-nerved, the first narrow, the second much broader, twice as long as the first, or both broad, similar and subequal; fertile lemma 3-nerved, glabrous or bearded at the base, glabrous or pilose on the margins and sometimes pilose across the back, the tip variously lobed or dentate, the nerves usually excurrent in short awns; rudiment reduced to 3 awns or glumaceous, lobed or dentate with 3 usually conspicuous awns.
Note Perennial (in our species), usually tufted grasses with slender culms and few to many short 1-sided spikes, racemose on a short or often elongated axis.
Key a. Plants annual; spikes 10-25. Sheaths and blades sparsely to densely papillose-pilose or papillose-hispid or the sheaths rarely glabrous - 1. B. DISTICHA aa. Plants perennial; spikes 4-10. b. Glumes 3-5 mm. long, glabrous or scabrous on the keel; culms widely spreading. Spikes linear, 1-4 cm. long- - 2. B. AMERICANA bb. Glumes 5-9 mm. long, usually hispid on the keel; culms erect or ascending. c. Lemma of the upper floret deeply cleft _- -_-_-_ - 3. B. REPENS cc. Lemma of the upper floret minutely dentate - ---- 4. B. FILIFORMIS
 
 
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