AGROSTIDE.E. 197 



the awns and the twisted base sej^arating by a Joint from the 

 glume. 



Massachusetts, E. Faxon 20; New Jersey, Beal 37; Minnesota, 

 Holzinger for Nat. Herb. 



Sandy soil. Eastern Massachusetts to New Jersey, also in Mex- 

 ico, Wisconsin, westward, and southward. 



3. A Californica Thurb. Boland. in Trans. Calif. Agr. Soc. 

 134 (1864). A. Jonesii Vasey, Contrib. U. S. Nat. Herb. 3:48 

 (1892). 



A slender densely tufted geniculate and much-branched grass, 

 often pubescent at the nodes. Sheaths loose, shorter than the 

 internodes, often pubescent; ligule ciliate; blades smooth or sca- 

 brous below, involute-setaceous, those of the sterile shoots 3-6 cm. 

 long, those above shorter. Panicle racemose, few-flowered, 3-6 

 ■cm. long, the lower spikelets in pairs. Empty glumes 1-nerved, 

 first 6 mm. long, second 10 mm. long; floral glume minutely 

 scabrous, about the length of the first glume, often spotted; awns 

 united below from the joint upwards for nearly 10 mm. bearing 

 nearly equal spreading tips 2.5-5 cm. long. 



California, State Survey 2217; Arizona, Jo^es 3895. 



Arizona, California and Mexico. 



Var. fugitiva Vasey, Contrib. U. S. Nat. Herb. 3: 49 (1892). 



"Differs from the type chiefly in the lower and more condensed 

 habit, and in the longer empty glumes." Vasey 1. c. 



Lower California, Palmer 501. 



Sand-beaches near the sea ; seeds easily blown about ; spikelets 

 varying from greenish yellow to purple and brownish black. 



4. A. spiciformis Ell. Bot. S. C. & Ga. 1 : 141 (1816). 



Culms rigid, erect, sparingly branched, 30-60 cm. high. Sheaths 

 shorter than the internodes; blades smooth, rigid, erect, involute, 

 those of the culm 2 in number. Panicle dense, spikelike, 15 cm. 

 long. Empty glumes narrow, 1-nerved; first 4 mm. long, with an 

 awn 10 mm. long; second 10 mm. long, with an awn still longer; 

 floret slender and with its beak 3-3.5 cm. long, the awns diverging, 

 the central one stouter and as long as the floral glume, the lateral 

 ones a little shorter. 



