376 CONTEIBUTIONS PROM THE NATIONAL HERBAEIUM. 



Chloris glaucescens Steud. Syn. PI. Glum. 1: 206. 3854. 



A weedy branching decumbent-ascending annual, the sheaths broad, com- 

 pressed, the blades thin, flat or folded, scaberulous or sparsely pilose, the 

 slender spikes somewhat flexuous. 



Ditches and waste places, southern Mexico and the West Indies to northern 

 South America. Originally described from Jamaica, Found throughout the 

 West Indies as a common weed along roadsides. 



6. Chloris orthonoton Doell in Mart. Fl. Bras. 2': 64. 1878. 



Sparingly stoloniferous, grayish, the flat culms commonly 40 to 60 cm. tall, 

 the compressed sheaths hairy in the throat, the flat or folded blades about 



5 mm. wide, scabrous on the upper surface ; spikes 4 to 9, ascending, somewhat 

 flexuous, the awns about 1 cm. long. 



Open ground and waste places, Mexico to Costa Rica; also in Cuba (Habana) 

 and Jamaica (Vere). Originally described from specimens growing in the 

 Botanical Garden at Montpellier, France. This species was formerly referred 

 by Hitchcock * to Chloris virgata. Chloris glaucescens was described from 

 Guadeloupe. In Cuba called " hierba de pavo." 



7. Chloris virg'ata Swartz, Fl. Ind. Occ. 1 : 203. 1797. 

 Chloris elegans H. B. K. Nov. Gen. & Sp. 1: 166. pi. Jtl. 1816. 



Chloris penicillata Willd. ; Steud. Nom. Bot. ed. 2. 1: 353. 1840, as synonym. 



Culms ascending, 20 to 40 cm. tall, scarcely compressed, the upper sheaths 

 slightly inflated, glabrous in the throat ; spikes mostly 5 or 6, suberect, some- 

 what flexuous in age, 3 to 5 cm. long ; fertile lemma villous on the keel to a 

 little below the summit. 



Open mostly sterile ground. West Indies to Brazil. Originally described 

 from Antigua. There has been some confusion as to the identity of this species. 

 There is no specimen of it in the Swartz Herbarium,' but Swartz's description 

 applies well to the form to which the name is here assigned, and not to the 

 form (0. orthonoton Doell) to which Kunth' assigned It. Doell* interprets 

 Swartz's species as it is here understood. Chloris elegans, originally described 

 from Mexico, is figured with lemma glabrous on the keel, but continental speci- 

 mens show all gradations between glabrous and strongly villous keels. 



Cuba, Jamaica (Linstead), and Guadeloupe. 



8. Chloris paraguayensis Steud. Syn. PI. Glum. 1: 204. 1854. 



Tufted, 30 to 75 cm. tall ; culms and sheaths strongly compressed ; blades 

 long, lax ; spikes about 10, usually flexuous, commonly purplish-tinged, 4 to 



6 cm. long, the slender spreading awns about 6 mm. long. 



Open ground and waste places, Mexico and the West Indies to South Amer- 

 ica. Originally described from Paraguay. Grisebach refers this species to 

 Chloris barbata Swartz. Common in the West Indies from the Bahamas and 

 Cuba to Martinique. 



9. Chloris ciliata Swartz, Prodr. Veg. Ind. Occ. 25. 1788. 

 Chloris propinqua Steud. Syn. PI. Glum. 1: 204. 1854. 



Culms rather stouter and blades firmer tlian in the preceding; spikes pale, 

 4 to 6, strongly flexuous, the florets conspicuously silky-ciliate, the awns 1 to 

 1.5 mm. long. 



'Contr. U. S. Nat. Herb. 17: 332. 1913. 

 '^See Coutr. U. S. Nat. Herb. 12: 142. 1908. 

 ' H. B. K. Nov. Gen. & Sp. 1 : 166. 1816. 

 * In Mart. Fl. Bras. 2': 65. 1877. 



