136 



CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



DISTRIBUTION. 



Swamps and ditches near the coast, Mexico and the West Indies to Argentina. 

 San Luis Potosi: Cardenas, Hitchcock 5737. 



Tabasco: Laguna de Peralta, Rovirosa 315, Gonzalez, Rovirosa 703. 

 Panama: Ormila, Pittier 4383. 

 Cuba: Habana, Lion 4168. 

 Jamaica: Savanna-la-Mar, Hitchcock 9868. 

 Santo Domingo: Sanchez, Taylor 66. Rincon, Fuertes 1419. 

 Porto Rico: Mayaguez, Chase 6290, 6319. Caguas, Sintenis 2543. Bayamon, 



Hioram 324 in part. Lares, Chase 6583. 

 Leeward Islands: Antigua, Wullschlaegel 635. 

 Windward Islands: Martinique, Duss 542. 

 Tobago: Hitchcock 10284; Broadway 4896. 

 Colombia: Santa Marta, Smith 108. 

 Dutch Guiana: Paramaribo, Kuyper in 1913. 

 Brazil: Parana, Diisen 11461. Without locality, Capanema 5398. 

 Paraguay: Pilcomayo River, Rojas 76; Morong 1070. 

 Uruguay: San Jose, Arechavaleta 227. 

 Argentina: Buenos Aires, Venturi 6419. 



3. Echinochloa oplismenoides (Fourn.) Hitchc. 



Berchtoldia oplismenoides Fourn. Mex. PI. 2: 41. 1886. "Toluca, Lerma (Berl. n. 



1140)." Berlandier's no. 1140 from Toluca, in the Paris Herbarium, is the type. 



Fournier has written the name upon the sheet. The specimen consists of three 



fragmentary culms with a few 

 racemes of characteristic spikelets. 



description. 



Plants annual; culms erect, as 

 much as 1 meter tall, glabrous, the 

 nodes glabrous or rarely appressed- 

 hispidulous; sheaths glabrous; ligule 

 wanting, or rarely a line of short 

 hairs; blades mostly less than 1 cm. 

 wide, scaberulous on the margins 

 and upper surface; panicles narrow, 

 usually not over 15 cm. long, the 

 axis angled, scabrous; racemes ap- 

 pressed, the lower mostly 3 to 6 cm. 

 long, the rachis angled, scabrous and 

 more or less stiffly pilose, not hispid 

 at base; spikelets rather densely set, 

 4 to 5 mm. long; first glume acutish, 

 glabrous; second glume hispid ulous 

 on the nerves, acuminate; sterile 

 lemma empty or with palea only, 

 the awn usually about 1 cm. long, 



Fig. 27.-Echinochloa oplismenoides. From Hitchcock 7527 rarel y M much aS 3 Cm - lon S> huit 

 Mexico. about 4 mm. long, mucronate. 



DISTRIBUTION 



Moist places, central Mexico. 

 Sonora: Cananea, Ricketts 2. 

 Chihuahua: Sierra Madre, Pringle 1404 



cock 7758. 

 Durango: Durango, Palmer 253 in 1896; Hitchcock 7616 



Sanchez, Hitchcock 7696. Minaca, Hitch- 

 Otinapa, Palmer 333 in 1906. 



