58 Hordeae 



flowering glume linear-oblong, terete, obtuse to shortly awned, 

 ribbed. 



Occasional in moist places along irrigating ditches and in low ground. 

 Flowering the year round. 



2. L. perenne multiflorum (Lam.) Auct. Annual or biennial ; 

 spikes often purplish, somewhat curved ; spikelets 15-30-flowered ; 

 flowering glumes usually with a short, slender awn. 



In similar locations and apparently more common than the type. 



3. L, temulentum L. (DARNEL.) Annual; culms rather stout, 

 3-8 dm. high, smooth ; sheaths smooth, usually somewhat exceed- 

 ing the nodes; spikes stout, with 9-15 spikelets; spikelets 5-7- 

 flowered ; empty glumes not ribbed, equaling or usually exceeding 

 the spikelets; flowering glume turgid, awnless or commonly 

 with a straight awn 2 cm. long or less. 



Occasional along roadsides and in grain fields. 



38. LEPTUBUS R. Br. HARD-GRASS. 



Mostly low annual grasses, with narrow leaves and 

 strict or curved elongated slender spikes ; spikelets 1-2- 

 flowered, sessile and single in alternate notches of the 

 jointed rachis. Empty glumes 1-2, narrow, rigid, acute, 

 5-nerved ; flowering glumes much shorter, hyaline, keeled, 

 1-sided to the rachis. Palea hyaline, 2-nerved. Sta- 

 mens 3 or less. Styles short, distinct. Grain narrow 

 glabrous free, enclosed in the glume. 



1. L. cylindricus Trin. Culms slender, erect, straight, 2-4 

 dm. high, somewhat tufted, simple or commonly branched, 

 smooth; sheaths smooth, much shorter than the internodes; 

 leaves ascending, 1-2 mm. wide, 3-8 cm. long, smooth; spike 

 green, 5-15 cm. long, straight; empty glume very acute, about 

 4 mm. long. 



Occasional on borders of salt marshes toward the coast. Mesmer; Wil- 

 mington; Oceans ide. 



2. L. incurvatus (L.) Trin. Culms much branched, internodes 

 more or less curved, more or less purplish throughout; spikes 

 numerous, incurved ; empty glumes 2, about 6 mm. long, narrow, 

 acute. 



Not known within our limits, but it occurs on the salt marshes at San 

 Diego and about San Francisco. 



