VEGETATIVE ORGANS OP GRASSES 



159 



wide, pointed, g-labrous, sUgiitly scabrous. Ligule ciliate, dense, 

 two to three mm., long. Collar hairy, auricles wanting. 



Poa campressa. Canada Blue Grass. Figiire 137. 

 A bluish green perennial. Besting period twenty-four days. 

 Ehizomes creeping, slender, one sixteenth to one eighth inch in 



Fig. 135. — Panicum Scribnerianuni. Scrlbner's Panicum. 

 sheath ; C, shoot at node ; D, terminal node and first shoot 



A, lignle ; B, 

 E, rhizome. 



diameter. One shoot from each branch; new shoots appear from 

 bud at node of old rhizome whi-ch later dies. Roots fibrous and 

 very slender but stout. Leaves folded in bud. Blades flat, 

 long, linear, pointed, pale green, glaucous, double lines along 

 luidnerve by transmitted light. Sheath tinged with red at base, 

 compressed, smooth. Ligule membranous, entire, acute, me- 

 dium long. Collar very light green. Auricles wanting. 



