94 MISC. PUBLICATION 4 2 3, U. S. DEPT. OF AGRICULTURE 



12. Spikelets ovate to ovate-oblong; pedicels spreading but not stiffly 

 divergent (13). 

 13. Plants up to 1 meter high; panicles 20 to 40 cm. long, with 

 drooping, many-flowered branches; leaf blades up to 1 cm. 



wide 9. E. neomexicana. 



13. Plants usually less than 30 cm. high; panicles small, few- 

 flowered, the branches relatively short, spreading but not 

 drooping 10. E. mexicana. 



1. Eragrostis cilianensis (All.) Link ex Vign. Lut., Malpighia 18: 



386. 1904. 



Eragrostis major Host, Icon. Gram. Austr. 4: 14. 1809; Fl. 

 Austr. 1: 135. 1827. 

 Coconino County to Mohave County, south to Cochise, Santa Cruz, 

 and Pima Counties, up to 6,000 feet, a common weed in cultivated 

 ground and waste places, May to October. Throughout the United 

 States except at higher altitudes, southward to Argentina ; introduced 

 from Europe. 



2. Eragrostis lutescens Scribn., U. S. Dept. Agr., Div. Agrost. Cir. 



9: 7. 1899. 

 Without locality (Lemmon 1321, in 1882). Dry ground and sandy 

 shores, rare. Idaho and Washington to Arizona and California. 



3. Eragrostis pilosa (L.) Beauv., Ess. Agrost. 71, 162, 175. 1812. 



Poa pilosa L., Sp. PL 68. 1753. 



Above Superior, Pinal County, 2,730 feet (Peebles et al. 2333), open 

 ground and waste places. Massachusetts to Colorado and Arizona, 

 south to Argentina. 



4. Eragrostis orcuttiana Vasey, Contrib. U. S. Natl. Herbarium 1: 



269. 1893. 

 University Campus at Tucson (Pima County), probably introduced, 

 fields and waste places, summer flowering. Colorado and Arizona to 

 Oregon and California. 



5. Eragrostis barrelieri Daveau in Morot, Jour, de Bot. 8: 289. 1894. 

 Tombstone, Cochise County (Harrison and Kearney 6081). Waste 



places, Oklahoma and Texas to California. 



6. Eragrostis pectinacea (Michx.) Nees, Fl. Afr. Austr. 406. 1841. 



Poa pectinacea Michx., Fl. Bor. Amer. 1: 69. 1803. 



Without locality (Palmer in 1869). Open ground and waste places, 

 Maine to North Dakota, south to Florida, Texas (and Arizona?), rare 

 westward. 



Palmer's specimen is small and immature, and may be only an 

 extreme form of E. diffusa. 



7. Eragrostis diffusa Buckl., Acad. Nat. Sci. Phila. Proc. 1862: 97. 



1862. 

 Almost throughout the State, up to 7,000 feet, open ground and 

 waste places, July to September. Texas to Nevada, southern Cali- 

 fornia, and northern Mexico, introduced eastward in a few localities. 



8. Eragrostis arida Hitchc, Wash. Acad. Sci. Jour. 23: 449. 1933. 

 Pinal, Cochise, Santa Cruz, and Pima Counties, 1,000 to 5,500 feet, 



dry soil, rocky ground, and waste places, August to October. 

 Missouri (where probably introduced) and Texas to Arizona. 



