346 COISTTEIBUTIONS FROM THE NATIONAL HEEBARroM. 



gain L. (to which, under Panicum, it is referred by Grisebach^), common in 

 the United States. The latter differs in the erect rather than nodding panicles. 

 with spreading rather than appressed branches, and in the culms erect or 

 spreading at base rather than decumbent and rooting. Certain specimens from 

 Bermuda (Collins 343-, Brown d Britton 333, Brown, Britton d Bissctt 1961, all 

 in the herbarium of the New York Botanical Garden) appear to be E. crusgalli. 

 Cuba, Jamaica, Porto Rico, Guadeloupe, Martinique, and Trinidad. 



4. Echinochloa spectabilis (Nees) Link, Hort. Berol. 2: 209. 1883. 



Panicum spectahile Nees, Agrost. Bras. 262. 1829. 



A robust fleshy perennial, tlie tall culms erect from a creeping base, the 

 nodes usually villous, the blades as much as 3 cm. wide, the narrow, densely 

 flowered panicle erect or nearly so. 



Swamps and ditches near the coast, southern Mexico and the West Indies to 

 Paraguay. Originally described from Brazil. 



Cuba (Almendares River), Jamaica (Savanna-la-Mar), Haiti, Santo Do- 

 mingo (Rincon), Porto Rico (Mayaguez), Antigua, Martinique, and Tobago. 



45. CHAETIUM Nees. 



Inflorescence a dense narrow panicle; spikelets lanceolate, the rachilla joint 

 between the glumes elongate, forming, with the bearded adnate base of the 

 first glume, a sharp-pointed callus ; glumes and sterile lemma awned ; fruit sub- 

 indurate, awn-tipped, the summit of the palea not inclosed. 



1. Chaetium cubanum (Wright) Hitchc. Contr. U. S Nat. Herb. 12: 232. 1909. 



Perotist cubana Wright, Anal. Acad. Cienc. Habana 8: 288. 1871. 



A slender erect tufted perennial about 40 cm. tall with narrow blades and 

 delicate few-flowered panicles of small long-awned spikelets. 



Only known from the type collection, Wright 735, from eastern Cuba. 



46. TRICHOLAENA Schrad. 



Inflorescence paniculate ; spikelets short-pedicellate, the first glume minute, 

 the rachilla joint between the glumes elongate; second glume and sterile lemma 

 copiously clothed with long, silky hairs, 2-lobed, with a delicate awn between 

 the lobes ; fruit sublndurate. 



1. Tricholaena rosea Nees, " Cat. Sem. Hort. Vratisl. a. 1836 ; " Fl. Afr. Austr. 

 17. 1841. Natal grass. 



A tufted short-lived slender perennial, about 1 meter tall, more or less de- 

 cumbent at base, with sparsely papillose-hirsute sheaths, narrow flat blades, 

 and beautiful silky rosy purple panicles (in herbarium specimens sometimes 

 faded to pinkish gray). 



Occasional in waste ground, sparingly introduced in the warmer regions of 

 the Western Hemisphere. Originally described from South Africa. 



Cuba (Habana, Campo Florido, Matanzas). 



47. CHAETOCHLOA Scribn. 



Inflorescence a dense spikelike (rarely loose) panicle, the spikelets solitary 

 or in small clusters subtended by 1 to several slender scabrous bristles (sterile 

 branchlets). these persistent after the fall of the spikelets; spikelets as in 

 Panicum, turgid, llie fruit usually transversely rugose. 



* Fl. Brit. W. Ind. 546. 1864. 



