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



mm long; lemma smooth and shining, 1 mm long, minutely toothed 

 at the truncate apex, the awn exceeding the glumes. 91 — Ditches 

 and wet places at low altitudes, British Colum- 

 bia to New Mexico and, California, east to 

 Louisiana, south to Argentina; a few localities 

 from Alabama to Texas (fig. 724); introduced 

 from Europe. 



4. Polypogon australis Brongn. (Fig. 725.) 

 Perennial; culms as much as 1 m tall; ligule 2 



to 3 mm long, fragile; 



blades commonly 5 to 7 



mm wide; panicle soft, 



lobed or interrupted, 



mostly 8 to 15 cm long, 



the numerous awns pur- 

 plish; glumes 1.5 to 2 mm 



long, hispidulous, the awn 



flexuous, delicate, 4 to 6 

 mm long; lemma about two thirds as long as 

 the glumes, the awn about 3 mm long. % (P. 

 crinitus Trim, not Nutt.) — Introduced at Bingen, 

 Wash. ; Chile and Argentina. 



Figure 722.— Distribution of 

 Polypogon monspeliensis. 



Figure 723.— Polypogon lu- 

 losus. Panicle, X 1; glumes 

 and floret, X 10. (Hitchcock 

 2686, Calif.) 



71. LYCTJRUS H.B.K. 



Spikelets 1 -flowered; glumes awned, the first usually 2-awned; 

 lemma narrow, firm, longer^ than the glumes, tapering into a slender 

 awn. Slender perennial, with grayish, bristly spikelike panicles, the 

 spikelets borne in pairs, the lower of the pair 

 sterile, the two falling together. Type species, 

 Lycurus phleoides. Name for Greek lukos, wolf, 

 and oura, tail, alluding to the spikelike panicles. 

 1. Lycurus phleoides H.B.K. Wolftail. 

 (Fig. 726.) Culms densely 

 tufted, 20 to 60 cm tall, 

 compressed, erect or de- 

 cumbent at base; blades 

 flat or folded, 1 to 2 mm 

 wide, those of the culm 

 mostly less than 10 cm 

 long; panicle 3 to 6 cm 

 long, about 5 mm thick; 



spikelets including awns about 5 mm long, the 

 glumes shorter than the lemma, the first 2- or 

 3-awned, the second usually 1-awned, the awns 

 slightly spreading; lemma 3-nerved, pubescent 

 at the margins, the awn 2 to 3 mm long; palea 

 about as long as the lemma, pubescent. 2/ — 

 Plains and rocky hills, Colorado to Texas and Arizona, south to south- 

 ern Mexico (fig. 727). An important southwestern forage grass. 



72. PHLEUM L. Timothy 



Spikelets 1-flowered, laterally compressed, disarticulating above the 

 glumes; glumes equal, membranaceous, keeled, abruptly mucronate 

 or awned or gradually acute; lemma shorter than the glumes, hyaline, 

 broadly truncate, 3- to 5-nerved; palea narrow, nearly as long as the 



Figure 724.— Distribution of 

 Polypogon lutosus. 



Figure 725.— Polypogon aus- 

 tralis X 10. (Suksdorf 10091, 

 Wash.) 



