220 MISC. PUBLICATION 200, U. S. DEFT. OF AGRICULTURE 



34. ORCtJTTIA Vasey 



Spikelets several-flowered, the upper florets reduced; rachilla 

 persistent, continuous, the florets falling away, or tardily disarticu- 



FIGTJEE 429. Anthochloa cohisana. Plant, X Yi\ spikelet and floret, X 5. (Type.) 



lating; glumes nearly equal, shorter than the lemmas, broad, irregu- 

 larly 2- to 5-toothed, many-nerved, the nerves extend- 

 ing into the teeth; lemmas firm, prominently 13- to 15- 

 nerved, the broad summit toothed; palea broad, as long 

 as the lemma. Low tufted annuals, with short blades 

 and solitary spikes or spikelike racemes, the subsessile 

 spikelets relatively large, the upper aggregate, the lower 

 more or less remote. Type species, Orcuttia californica. 

 Named for C. R. Orcutt. 



Lemmas with 7 to 11 short teeth _____________ 1. O. GREENEI. 



Lemmas with 5 awn-tipped teeth. 



Blades filiform, glabrous ____________________ 2. O. TENTHS. 



Blades flat, 1.5 to 3 mm wide, pilose ____ 3. O. CALIFORNICA. 



1. Orcuttia greenei Vasey. (Fig. 430.) Culms 15 

 to 20 cm tall, suberect; blades 2 to 3 cm long, sub- 

 involute; raceme 3 to 7 cm long, pale; spikelets 10 to 

 15 mm long, loosely papillose-pilose; glumes 4 to 5 mm 

 long; lemmas 6 mm long, the obtuse or truncate tip 

 spreading, 7- to 11-toothed, the teeth mucronate but 

 not awned. o Known only from moist plains of 

 f- ne U pp er Sacramento near Chico, Calif. 

 2. Orcuttia tenuis Hitchc. (Fig. 431.) Culms in small tufts, 

 slender, erect, 5 to 12 cm tall; leaves mostly basal, the blades firm, 



(Type.) 



