FLOWERIXG PLAXTS AND FERNS OF ARIZONA 133 



2. Leptochloa filiformis (Lam.) Beauv., Ess. Agrost. 71, 161, 166. 



1812. 



Festuca filiformis Lam., Tabl. Encycl. 1: 191. 1791. 



Coconino, Yavapai, Pinal, Maricopa, Cochiso, Santa Cruz, and 

 Pima Counties, 1,200 to 5,000 feet, cultivated land, along streams, etc., 

 May to September. Virginia to eastern Kansas, south to Florida, 

 Texas. Arizona, southern California, Mexico, and Argentina. 



3. Leptochloa viscida (Scribn.) Beal, Grasses North Amer. 2: 434. 



1896. 



Diplachne viscida Scribn., Torrey Bot. Club Bui. 10: 30. 1883. 



Maricopa. Cochise, Santa Cruz, and Pima Counties, 1,000 to 3,500 

 feet, open ground and waste places, June to October, type from 

 Tucson (Pringle in 18S1). Western Texas (El Paso) to California and 

 northern Mexico. 



4. Leptochloa fascicularis (Lam.) A. Gray, Man. 588. 1848. 



Festuca fascicularis Lam., Tabl. Encycl. 1: 189. 1791. 



Navajo and Pima Counties, along ditches and in moist waste places, 

 often in brackish marshes, July to October. Throughout the United 

 States, south to Argentina. 



5. Leptochloa uninervia (Presl) Hitchc. and Chase, Contrib. U. S. 



Natl. Herbarium 18: 363. 1917. 



Megastachya uninervia Presl, Reliq. Haenk. 1: 283. 1830. 



Pinal, Maricopa, Pima, and Yuma Counties, along ditches, road- 

 sides, and moist waste places. Mississippi to Colorado, Arizona, 

 southern California, and northern Mexico; Peru to Argentina. 



50. DACTYLOCTENIUM. Crowfootgrass 



Decumbent, spreading annual with short, broad leaf blades and 2 to 

 several thick, digitate, ascending or spreading spikes, the rachis ex- 

 tending beyond the spikelets; spikelets compressed, 3- to 5-flowered, 

 horizontally spreading; glumes subequal, the second bearing a short, 

 stout spreading awn; lemmas thin, acute, 3-nerved, awnless. 



1. Dactyloctenium aegyptium (L.) Richt., PL Eur. 1: 68. 1890. 



Cynosurus aegyptius L., Sp. PL 72. 1753. 



A weed on the University campus, Tucson (Pima County). North 

 Carolina to Florida, California, and tropical America; introduced from 

 the Old World. 



51. CYXODOX. Bermudagrass 



Stoloniferous perennial with narrow, often short leaf blades and few 

 to several, slender, digitate spikes; spikelets 1-flowered, the rachilla 

 prolonged beyond the spikelet in a naked stipe; glumes subequal, the 

 first lunate, the second lanceolate; lemma acute, awnless, pubescent on 

 the nerves; palea as long as the lemma. 



A very abundant grass in the irrigated valleys of southern Arizona, 

 where it is hard to eradicate except by frequent cultivation or shading. 



