98 



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



Figure 111. — Pleuropogon hooverianus. Floret and 

 raehilla joint, X 5. (Dupl. type.) 



soft, somewhat inflated, transversely 

 veined; blades 10 to 30 cm. long, 6 

 to 9 mm. wide, glabrous; raceme 20 

 to 33 cm. long; spikelets 2 to 5.5 

 cm. long, 8- to 20-flowered, erect or 

 ascending; lemmas 5. 5 to 7.5 mm. 

 long, strongly nerved, obtuse, awn- 

 less or mucronate; palea oblong, 

 prominently winged, two-thirds to 

 nearly as long as the lemma. % — 

 Wet ground around marshes and 

 creek beds, Sherwood and Walkers 

 Valley (Mendocino CountjO to Big 

 Valley (Lake County), Calif. 



Figube 112.— Pleuropogon davyi. Floret and raehilla 

 joint, X 5. (Type.) 



5. Pleuropogon oregonus Chase. 

 (Fig. 113.) Culms 55 to 90 cm. tall, 

 erect from slender rhizomes, soft, 

 spongy, with long internodes; sheaths 

 overlapping, the lower rather loose; 

 ligule 4 to 5 mm. long, lacerate; 

 blades 8 to 18 cm. long, 4 to 7 mm. 

 wide, mucronate, scaberulous; raceme 

 6 to 16 cm. long; spikelets 1.5 to -1 

 cm. long, 7- to 13-flowered, ascending; 



Figure 113. — Pleuropogon oregonus. Plant, X 1; 

 floret, X 10. (Type.) 



glumes 2 to 4 mm. long, nerveless; 

 lemmas 5.5 to 7 mm. long, obtuse, 

 erose, awn 6 to 10 mm. long; keels 

 of palea with an awn 2 to 7 mm. 

 long, about one-third from the base. 

 % — Wet meadows, Union (Union 

 County) and Adel (Lake County), 

 Oreg. 



