MANUAL OF THE GKASSES OF THE UNITED STATES 



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strongly nerved, filiform, 1 to 2 cm long; raceme more than half the 

 entire height of the plant, the lower spikelets distant, the upper 

 approximate but not crowded; spikelets purple- tinged, 12 to 15 mm 

 long, the rachilla joints pubescent; glumes and lemmas scabrous, 

 sometimes with a few hairs toward the base of the lemmas; glumes 3 

 to 4 mm long, sharply toothed; lemmas 5 mm long, 5-toothed, the 

 teeth acuminate, awn-tipped, the rigid tips spreading or slightly 

 recurved. © — Known only from sandy open ground, Goose 

 Valley, Shasta County, Calif. 



3. Orcuttia californica Vasey. (Fig. 432.) Culms 5 to 15 cm 

 long, spreading with ascending ends, forming little mats; foliage thin, 

 pilose, the sheaths loose, the blades 2 to 4 cm long; raceme loose below, 



Figure 431.— Orcuttia tenuis. Plant, X Hi spikelet and 

 floret, X 5. (Type.) 



Figure 432.— Or- 

 cuttia californica. 

 Panicle, X lj 

 floret, X 5. 

 (Munz 10804, 

 Calif.) 



dense or subcapitate at the summit; spikelets 8 to 12 mm long, 

 densely to sparsely pilose; glumes sharply- toothed; lemmas about 6 

 mm long, deeply cleft into 5 awn-tipped teeth. O — Drying 

 mudflats, near Murietta, Hot Springs, Riverside County, Calif.; 

 Baja California. 



35. BLEPHARIDACHNE Hack. 



Spikelets compressed, 4-flowered, the rachilla disarticulating above 

 the glumes but not between the florets; glumes nearly equal, corn- 

 Dressed, 1-nerved, thin, smooth; lemmas 3-nerved, the nerves ex- 

 tending into awns, deeply 3-lobed, conspicuously cilia te, the first and 

 second sterile, containing a palea but no flower, the third fertile, the 

 fourth reduced to a 3-awned rudiment. Low annuals or perennials, 

 with short, dense, few-flowered panicles scarcely exserted from the 



