356 MISC. PUBLICATION 200, U. S. DEPT. OF AGRICULTURE 



Figure 730.- 

 glumes and 

 Calif.) 



■Gastridium 

 floret, X 10. 



ventricosum. Plant, X J^i 

 (Davy and Blasdale 5340, 



ovatus. Name from Greek 

 logos, hare, and oura, tail, al- 

 luding to the woolly heads. 



1. Lagurus ovatus L. 

 (Fig. 731.) Culms branching 

 at the base, 10 to 30 cm tall, 

 slender, pubescent; sheaths 

 and blades pubescent, the 

 sheaths somewhat inflated, the 

 blades flat, lax; panicle 2 to 3 

 cm long, nearly as thick, pale 

 and downy, bristling with 

 dark awns; glumes very nar- 

 row, 10 mm long, the awns of 

 the lemmas much exceeding 

 them, o — Cultivated for 

 ornament and sparingly es- 

 caped; has been found at 

 Pacific Grove, San Francisco, 

 and Berkeley, Calif.; ballast, 

 Beaufort, N.C.; Mediterra- 

 nean region. 



75. MUHLENBERGIA 

 Schreb. Muhly 



Spikelets 1 -flowered (occa- 

 sionally 2-flowered in M. asjjer- 

 ifolia), the rachilla disarticu- 

 lating above the glumes; 

 glumes usually shorter than 

 the lemma, sometimes as long, 

 obtuse to acuminate or awned, 

 keeled or convex on the back, 

 the first sometimes small, 

 rarely obsolete; lemma firm- 

 membranaceous, 3-nerved (the 

 nerves sometimes obscure or 

 rarely an obscure additional 

 pair), with a very short callus, 

 rarely long-pilose, usually 

 minutely pilose, the apex 

 acute, awned from the tip or 

 just below it, or from between 

 very short lobes, sometimes 

 only mucronate, the awn 

 straight or flexuous. Peren- 

 nial or rarely annual low 

 or moderately tall or rarely 

 robust grasses, tufted or 

 rhizomatous, the culms simple 

 or much-branched, the inflores- 

 cence a narrow ( sometimes 

 spikelike) or open panicle. 



