5^ TRIANDRIA. DIGYNIA. 



to Phalaris; its habit is that of Crijpsis. To Agrostis It has 

 no affinity whatever. 



Of this genus there are only 2 other species, the 

 C. andeatay common to the south of Europe and Bur- 

 bary, and like the C. sguarrosa annual The 2d bpe- 

 cies, C. Schoenoidos, grows in Italy, the south of France, 

 Spain and Smyrna. These 2 specit^sare nearly related to 

 the genus PUemn. The C. squarrosa in the structure of 

 the corolla glume, appears much more nearly allied to the 

 genus- Cenchrus. 



76. PIILEUM. L. (Cat's-tail Grass. Timothy- 

 Grass.) 



Calix S-valved, 1 -flowered, valves linear with 

 a retuse point, prominently carinate, each ter- 

 minating in a cusp (or short awn). Corolla in- 

 cluded within the calix. 



Flowers in dense cylindric spikes, simple, or partially 

 dividtd, calix indurated, generally rough, ciliate or his- 

 pid, flat and truncate, with the mid-rib going out into a 

 shortish awn. 



Species. \. P. pretense. (Introduced, now naturalized in 

 the United States, and ol great importance in agriculture.) 

 Tne few species of this genus (7) i-re all natives of Eu- 

 rope, with the exception of the P. dentatiim of the Cape 

 of Good Hope, which evidently belongs to some other 

 genus. 



77. rOLYPOGON. Desfontaines, 



Calix 2-valved, 1-flowered, each of the valves 

 awned. Corolla 2-valved, shorter than the calix, 

 the exterior valve terminating in an awn. 



Culm simple or branched, flowers in spiked panicles, 

 awns of the calix Jong and straight (being properly an 

 : elongation of the mid rilj,) awn of the corolla slender, 



also ternrdnal and en'cK 



Species. I. P crimtum? {Phlenm crinitiim, Sii-iiTn.) Vhe 

 Phleum dfscnbed hy Mr Elliott, must either be this 

 plant, or a new species, as he describes tt,e spike to be 

 compotmd, and the mid-nb of the calix cxie-id d into an 

 awn twice its length- with a coroUa " mucii smaller than 

 the culix." Mr. E. found it upon .Sidlivan's 'shmd, appa- 

 rt ntly naturalized, and not more han 6 to 10 inc! es high 

 Of tlio P. pratensCf Sir J. E. Smith, in Flor. Bnt. says' 



