342 MISC. PUBLICATION 200, TT. S. DEPT. OF AGRICULTURE 



1. ColeanthuS'Subtilis (Tratt.) Seidel. (Fig. 700.) Culms spread- 

 ing, forming little mats, mostly less than 5 cm long; panicle 5 to 10 

 mm long, the short branches verticillate ; lemma about 1 mm long, 

 the awn about equaling the dark caryopsis. o — Mud flats along 

 the lower Columbia River, Oregon and Washington, well established 

 but probably introduced; northern Eurasia. 



Figure 699.— Phippsia algida. Plant, X H] glumes and floret, X 10. (Oldmixon, Alaska.) 



,Mibora minima (L.) Desv. Delicate annual 3 to 10 cm tall with 

 short narrow blades and slender racemes of 6 to 8 appressed purple 

 spikelets, 2 mm long, the glumes obtuse, the lemma and palea shorter, 

 pubescent, o — Plymouth, Mass. ; introduced from Europe. 



Figure 700.— Coleanthus subtilis. Plant, X 1; lemma and palea and two views of spikelet with ripe 

 caryopsis, X 20. (Howell, Oreg.) 



67. CINNA L. Woodreed 



Spikelets 1 -flowered disarticulating below the glumes, the rachilla 

 forming a stipe below the floret and produced behind the palea as a 

 minute bristle; glumes equal or subequal, 1- to 3-nerved; lemma 

 similar to the glumes, nearly as long, 3-nerved, bearing a minute, 

 short, straight awn just below the apex (rarely awnless); palea 

 1-keeled. Tall perennials with flat blades and close or open panicles. 

 Type species, Cinna arundinacea. Cinna (kinna) an old Greek name 

 for a grass. 



