GRAMINEE. 413 



10. BRACHYELYTRUM, Beauv. Short-husk Grass, 



Gr. brachiis, short, and elytron, husk ; from the very short glumes. 



Spikelets 1 -flowered, with a filiform pedicel of an abor- 

 tive second flower, few in a simple appressed raceme. Lower 

 glumes obsolete. Pale.e involute, inclosing the linear- 

 oblong grain, somewhat equal, the lower 5-nerved, the upper 

 2-pointed. Stamens 2 ; the linear anthers and atigmaa 

 verj long. — A perennial t/russ, with dm pie culms, rather 

 downy sheaths, broad and flat lanceolate pointed leaves, and large 

 spikelets. 



B. aristatum, Beauv. 



Culm er-jct, from creeping rootstocks; paiticfe simple, loose. 



Rocky woods, common. June. Culm 1 to 3 feet high, slondor. Leaves 4 to 6 

 inches long. Lower paU(E with a very long awn. Spikebelp % inch long. 



11. CALAMAGROSTTS, Adans. Reed Bent-Grass. 



Gr. calamos. a reed, and agrostix, a grass. 



Spikelets 1-flowered, in an open, contracted, or spiked 

 panicle. Glumes 2, keeled or boat-shaped, often acute, 

 nearly equal. Pale^e 2, mostly shorter than the glumes, 

 surrounded with a copious tuft of white bristly hairs; the 

 lower one bearing a slender awn on the back or below the 

 tip, rarely awnless. Stamens 3. Grain free. — Perennials, 

 with running rootstocks, and mostly tall and simple rigid flowers. 



1. C. Canadensis, Beauv. Canadian Reed- Grass. 



Panicle oblong, loose; lower pihaz nearly a« long as the lanceolate acute glumeo, 

 hearing an exceedingly delicate awn below the middle ; rudimentary pedicel minute. 

 (Arundo Canadensis, Micltx.) 



Wet grounds. July. Rather glaucous. Crdm 3 to 5 feet high. Leaves a foot 

 long, flat, narrow. Panicle erect, much divide 1, at length spreading, often purplish. 



2. C. CONFINIS, Nutt. Close- flowered Reed-Grass. 



Panicle elongated, narrow, the branches appreSw d after flowering, pale ; lower 

 palece nearly equalling the oblong-lanceolate acute glumes, with a rather stout and 

 slightly exserted awn between the middle and the base ; pappus nearly as long aa 

 the flower. 



Swamps. July. Culm erect, simple, about 3 feet high. Leaves about J^ ineh 

 wide, imooth. Panicle 5 to 8 inches long. 



3. C. coarctata, Torr. Glaucous Reed-Grass. 



Panicle contracted, dense ; lower palece shorter than the acuminate tips of the 

 lanceolate glumes, awned ; pappus % as long as the flower. 



Wet meadows. Aug. Culm 3 to 5 feet high, simple, somewhat glaucous. Leaves 

 linear lanceolate, scabrous and somewhat hairy. Panicle b to 6 inches long. 



12. STIPA, Linn. Feather-Grass. 



Gr. stypa, tow; in allusion to the flaxen appearance of the feathery awns of some- 

 of the species. 



Spikelets 1-flowered: the flower stipitate. Lower pa- 

 T2* 



