AGROSTIDE.E. 223 



90 cm. high. Sheaths longer than the iuternodes; upper ligule 

 less than 1 mm. long; blades of the sterile slioots few, those on the 

 culms 7 iu number, rigid, involute, the middle ones 15-25 cm. 

 long, the upper about 12 cm. long. Panicle narrow, tliin, inter- 

 rupted, 10-20 cm. long; rays in fours, fives, and sixes in distinct 

 half whorls, the longest ray 7 cm. long, flower-bearing above the 

 middle. Empty glumes hyaline, tinged witli purple, equal, or the 

 lower a little longer, 7-9 mm. long, 3-nerved, the lateral nerves 

 merging into the central one before reacliiug the middle; floret 

 pubescent, narrow, 5 mm. long, including the blunt callus and the 

 crown of short hairs; awn twice bent, 15-50 mm. long; palea 

 pubescent, 2.5 mm. long. Stamens 3; anthers pencil-tufted. 



Mexico, Pringle 385 in 1885. 



Distributed as Stipa, without a specific name. 



19. S. Hassei A^asey, Contrib. U. S. Nat. Herb. 1:267 (1893). 



Culms very slender, erect, densely tufted, branching below, 30- 

 45 cm. high. Sheaths narrow; ligule short; blades setaceous, 

 10-20 cm. long. Panicle open, narrow, erect, 5-7 cm. long, rays 

 mostly in twos and threes, the longest 3 cm. long, naked below. 

 Empty glumes linear-lanceolate, subequal, about 5 mm. long, first 

 1-3-nerved. second 3-nerved; stipe short, bearing a few short hairs; 

 floral glume thin, about 4.5 mm. long. 4-nerved, the awn 16-18 

 mm. long, twisted below and bent above the middle; palea about as 

 long as its glume. Grain oblong, about 2 mm. long. Nearly allied 

 to S. eminens Andersoni Vasey. 



California (Santa Monica), Dr. H. E. Hasse, for wliom Dr. 

 Vasey named it. 



47. (110). Oryzopsis Miehx. Fl. Bor. Am. 1:9 (1803). 

 Dilepyrwn Eafin. Med. Repos. N. Y. 5:353 (1808). Piptatherum 

 Beauv. Agrost. 17, /. 5, f. 10, 11 (1812). Urachne Trin. Fund. 

 Agrost. 109 (18-:j0). Caryocliloa Spreng. Syst. 4: Cur. Post. 22, 30 

 (1827). FiptochcetmmJ. & C. Presl, Eel. H«nk. 1:222. (1830). 

 Nassella E. Desv. C. Gay, Fl. Chil. 6:263, t. 75, f. 1 (1853). 

 FendJeria Steud. Syn. PI. Gram. 419 (1855). 



Spikelets 1-flowered, usually ovoid or oblong, paniculate, rachilla 

 articulate above the lower glumes, not produced above the floret, 



