AGROSTIDE.E. 343 



toothed, the stout twisted awn starting below tlie middle and ex- 

 tending 0.5 mm. above the iloret. hairs few and weak, half as long 

 as the lloral glume, the hairy rudiment 0.5 mm. long. 



Pennsylvania (dry woods in Huntington County), Porter; New 

 York, I)}(dley. 



9, C. Macouniana Vasey, Contrib. U. S. Kat. Herb. ;}; SI 

 (1892). Deyeuxia Macouniana XnBey, Coult. Bot. (jiaz. 10: ;»!iT 

 (1885). 



Culms from cree})ing rootstocks, slender, ereet, branching 

 sparingly along the middle, 00-90 cm. high, iiiternoiles about 5 in 

 number, besides the very short ones below. Sheaths nearly smootii, 

 longer than the internodes; ligule lacerate, thin, 'i mm. long; bhides 

 scabrous, Hat orinvohitc, apex attenuate, the blade l5-*^'o cm. long, 

 3-;) mm. wide. Panicle open, 10-12 cm. long, 2—1 cm. broad; 

 rays mostly in fives, erect, sleiuler, clusters 1-1.5 nn. distiint. 

 Spikelcts purple below, mostly on the u})per part of tne branches, 

 oval-lanceolate, about 2 mm. long; first glume ovate-lanceolate, 1- 

 nerved, second a little shorter, 3-nerved, otherwise like the first; 

 floral glume ovate, oblong, 2-lobed, 1.5 mm. long, awn near the 

 middle of its ghime, straight, reaching a little beyond its ai)ex; palea 

 oval, 1 mm. long, apex truneate-tootheil, hairs as long as the Iloret, 

 hairy rudiment one-third mm. long. 



British America, Macon n for U. S. Dept. Agricul. 44. 



]?orders of marshes. 



10. C. Scribneri. Deyeuxia chihia Scribn. Coult. Bot. Gaz. 

 11:114 (1880). C'alamugrostis (labia Vasey, Contrib. U. S. Nat. 

 Herb. 3: (1892). 



Perennial; culms rather slender, erect, GO-90 cm. high. 

 Sheaths scabrid, much shorter than the internodes; ligule 3 mm. 

 long, (lecurrent; blades scabrous, about 20 cm. long, 4 mm. wide. 

 Panicle lanceolate, about 15 cm. long; rays erect, 3-G, the longest 

 4-0 cm. long, flower-bearing on the outer three-fifths. S[)ik('K'ts 

 subsessile or pedicellate, linear-lanceolate, 3-4 mm. long; cnntty 

 glumes equal, scabrid, second 3-nerved. bristle 0.5 mm, long, hairs 

 twice as long; floral glume oval, truncate, 4-toothiMi, 2-.i mm. 

 long, awn rather short, attached below the middle and exteiuliuEr 



