210 POACEiE. 



30. A. Schiediana Trin. & Eupr. Mem. Acad. St. Petersb. (VI.) 

 7:120 (1849). 



A straggling perennial, sometimes sjiaringly branching, 60-90 

 cm. high. Sheaths usually shorter than the internodes; ligule 

 short; leaves of sterile shoots few^ those of the culm 3-4 in number, 

 scabrous, flat or involute, setaceous above, 20-30 cm. long. Pani- 

 cle little exserted, thin, widely spreading, 20-40 cm. long, rays 

 slender, in twos and threes, or even fours, flower-bearing from 

 near the middle; some of them 8-13 cm. long. Spikelets few, 

 appressed to the branches, empty glumes awnless, 1-nerved, nearly 

 equal, 9-11 mm. long; floral glume spotted, hispid, scabrous above, 

 11-20 mm. long to the adnate lateral awns; middle awn about 10 

 mm. long, twisting at the base when mature. 



Mexico, Pringle 387; Lower California, Palmer 268. 



Texas to Arizona, Mexico, and Lower California. 



Var. minor Vasey, Bull. Torr. Bot. Club, 13: 28 (1886). Culms 

 30-50 cm. high; panicle 12-18 cm. long; rays single, but dividing 

 immediately. Vasey thinks it might be considered a distinct 

 species. 



Arizona, Pringle. Jones in 1884. 



31. A. Orcuttiana Vasey, Bull. Torr. Club, 13:27 (1886). 



A leafy tufted perennial, stout below, slender above, 40-60 cm. 

 high. Sheaths longer than the internodes; ligule very short and. 

 ciliate at the throat; leaves of sterile shoots numerous, blades tar- 

 dily involute, 2-3 mm. wide, those of the culm narrower, 20-30 

 cm. long. Panicle exserted, open, 10-12 cm. long, rays distant, 

 flexuose, usually single, some of the longest 8 cm. long. First 

 glume 3-nerved, 10-12 mm. long, second 1-nerved, 7 mm. long; 

 floral glume spotted, 12 mm. long to the apex of the adherent 

 lateral awns, central awn twisted and bent when dry, about 5 mm. 

 long. 



Arizona, Jones 4233; Southern California, Orcntt ; Mexico, 

 Pringle 386, Palmer 769. 



32. A. manzanilioana Vasey, Contrib. U. S. Nat. Herb. 1: 282 

 (1893). 



