MANUAL OF THE GRASSES OF THE UNITED STATES 



107 



ovoid, dense, spikelike, 2 to 5 cm long, 1 to 2 cm wide, pale or pur- 

 plish; spikelets 6 to 10 mm long, about 5-flowered; glumes broad, 



Figure 



-Poa arachnifera. Plant and pistillate (2) and staminate (d 1 ) panicles, X I; pistillate (?) 

 and staminate (o ) florets, X 10. (Blackman, Tex.) 



3-nerved,4 to 6 mm long: lemmas 6 to 7 mm long, slightly webbed at 

 base, pubescent on the lower part of the keel and marginal nerves, 



_____ scabrous on the upper part of the keel, usually 



Cr^ — r^^ 777 with 1 to 3 pairs of intermediate nerves. 91 

 — Sand dunes near the coast, California, Point 

 Arena to Monterey. 



10. Poa confinis Vasey. (Fig. 173.) Plants 

 dioecious, the two kinds similar: culms often 

 geniculate at base, usually less than 15 cm tall, 

 sometimes as much as 30 cm: blades involute, 

 those of the innovations numerous: panicle 

 narrow, 1 to 3 cm long, tawny, the short branches ascending or 

 appressed; spikelets 4 to 5 mm long, mostly 3- or 4-flowered; glumes 



Figure 170.— Distribution of 

 Poa arachnifera. 



