CLXI. GRAMINE^E. 621 



lets in pairs about 3-flowered ; glumes both in front, lance-linear, slightly con- 

 nate at base, produced into a scabrous awn ; fls. smooth ; lower palea awned. 

 -2J Banks of streams, N. Eng. to 111., S. to Va. Aug. 



2. E. CANADENSIS. (E. glaucifolius. Willd.) 



St. erect, smooth, stout, 3 5f high; Ivs. lance-linear, flat, smooth, dark 

 green or often glaucous ; spike rather spreading, 4 8' long, generally nodding 

 at the summit ; rachis hairy ; spikelets 2 5-flowered ; glumes 5 7- veined, short- 

 awned, hairy ; lower palea hairy, awned. Tj. A tall, showy grass, with long, 

 recurred, waving spikes. River banks, &c., Free States and Brit. Am. Aug. 



3. E. VILLOSUS. Muhl. Rye Grass. 



St. slender, striate, smooth, 2 3f high ; Ivs. rough-edged, pubescent above, 

 ' broad ; sheaths hairy, especially the lower ones ; spike 2 \ 3' long, a little 

 nodding and spreading; rachis andflmvers hispid, pilose ; spikelets 1 3-flowered ; 



flumes linear; lower palea with a long, straight awn. 7J. Dry grounds, Free 

 tates. July. 



4. E. HYSTRIX. Hedgehog Grass. 



St. round, smooth, 2 4f high ; Ivs. lance-linear, carinate, scabrous, gene- 

 rally glaucous and with the sheaths striate; spike 4 6' long, erect; rachis 

 nearly smooth, flexuous ; spikelets remote, diverging, almost horizontal, 23- 

 flowered ; glumes 0, rarely 1 or 2 ; fls. smoothish ; lower paka terminating in a 

 very long awn. Tj. An odd-looking grass, in moist woods, Free States, common. 

 July. 



5. E. STRIATUS. Willd. Striated Lime Grass. 



St. slender, erect, 812' high ; Ivs. and sheaths smooth, the former lance- 

 linear, acuminate, scabrous on the upper surface; spike erect, 2 3' long; invol. 

 4-leaved, strongly veined, 2-flowered, one flower commonly 'abortive ; spikelets 

 in pairs, somewhat spreading, hispid, each 2-flowered; awns 3 or 4 times as 

 long as the paleae. 4j_ Mass., Sigelow, to Peun., W. to Ohio, rare. A small 

 and slender species. July. 



TRIBE 10. ANDROPOGONEJE. Inflorescence panicled or spiked. Spike- 

 lets generally in pairs, one sessile and perfect, the other mostly pedicellate 

 and imperfect. Glumes of stouter texture, than the palese. Paleae delicate 

 and membranaceous, the lower commonly awned. 

 56. ANDROPOGON. 



Gr. avfyos, of a man, Trwywv, beard; in allusion to the hairy flowers. 



Spikelets in pairs, polygamous, the lower one incomplete, on a plu- 

 mosely bearded pedicel, upper one 1 -flowered, perfect ; glumes sub- 

 coriaceous, awnless ; palese shorter than the glumes, one generally 

 awned. 



1. A. FURCATUS. Muhl. Forked Spike. 



St. semiterete above, 4 7f high ; Ivs. lance-linear, rough-edged, radical 

 ones very long ; spikes digitate or fasciculate, in 2s 5s", 3 5' long, purple ; 

 tpikdets appressed, abortive one on a plumose pedicel, tf with 2 paleae, awnless, 

 perfect one with 2 unequal glumes ; lower palea bifid, awned between the divi- 

 sions. 1\. Meadows and low grounds, Free States and Can. Aug. 



2. A. SCOPARIUS. Michx. (A. purpurascens. Muhl.) Broom Grass. 



St. slender, paniculate, 3f high, branched, one side furrowed, branches 

 fasciculate, erect; Ivs. lance-linear, somewhat hairy and glaucous; spikes sim- 

 ple, lateral and terminal, on long peduncles, 2 3 from each sheath, purple ; 

 spikelets remote, abortive one neuter, mostly with 2 paleae, awned. - 1|. Woods, 

 II. S. Aug. 



3. A. VIRGINICUS. 



Caespitose ; st. subcompressed, 3f high, branches few and short, half con- 

 cealed ; Ivs. linear, lower ones a foot or more long, rough-edged and hairy ; 

 sheaths smooth ; spikes short, in slender, half concealed fascicles of 2 or 3, late- 

 ral and terminal ; abortive spikelet a mere pedicel, without paleae ; monan- 

 drous, with a straight awn. Tj. Swamps, meadows, &c., N. Eng. to Ky. Sept. 



