616 aRAMINE^. (grass FAMILY.) 



base of the Jirm-memhranaceous lower palet, wliich bears near its base a twisted awn 

 of its own length. — Dry woods, Pulpit Kocks and vieinity, Huntingdon Co., 

 Pennsylvania, Prof. T. V. Purler. 



7. C. PiekeX'ingii, Gray. Culm l°-l^ohigh; leaces short ; panicle pi/- 

 ramidal, jjurpiisli ; glumes ovate-oblong, bluntisU or bluntly pointed (l^"-2" 

 long) ; hairs both of tliejluwer and of the rudiment virij short ami scanty, one lourtli 

 or fifth the Icngtii of the flower, none behind the obtuse lower palet, which 

 bears between its middle and biise a short and stout (straight or bent, not twisted) 

 awn. — White Mountnins, New Hampshire, in the al})ine region of Alt. Wash- 

 ington (Dr. Pirkeriiuj, &e.) ; and a more luxuriant form with smaller spikelets 

 at Echo Lake, Franconia, W. Buott. Sept. 



§2. CiVLAMOViLFA. Glumes and equal palets rather chartaceous, compressed- 

 keeled ; the. lower yUime shorter than the upper and shorter than the palets, of which 

 the lower is l-iierved and entirely awnless: the upper strongly '2-lceeUd : rudiment 

 of second fower wantiny : panicle open and loose. 



8. C. brevipilis, Gray. Branches of the diffuse pyramidal panicle capil- 

 lary (purplish); glumes ovate, mueronate; the upper slightly, the lower nearly 

 one half shorter than the palets, which are above twice the length of the hairs and 

 bristly-bearded along the hels. (Arundo brevipilis, Torr.) — Sandy swamps, pine- 

 barrens of New Jersey : rare. Sept. — Culm 3° -4° high : leaves nearly flat. 



9. C. longif61ia, Hook. Culm (l°-4° high) stout, from thick running 

 rootstocks ; leaves rigid, elongated, involute above and tapering into a long tln-ead- 

 like point; branches of the pyramidal panicle smooth; glumes lanceolate, the up- 

 per as long as the similar palets, the lower one fourth shorter ; the ro/>ious hairs 

 viore than half the length of the naked pnlels. — Sands, along the upper Great Lakes, 

 from Illinois and Michigan northwestward. Aug. — Spikelets 2^" long. 

 Sheaths clothed with deciduous wool. 



§3. AMM6PHILA, Host. Rudiment nf second flmoer present and pi umo>ten1m'e: 

 glumes nearly equal and rather longer than the equal similar palets, scarious-char- 

 aceous, lanceolate, compressed-keeled: lovw palet 5-nerved, slightly mueronate or 

 obscurely au-ned near the tip ; the uppei- 2-kepled : squamulrv Innreohite, much longer 

 than the ovary : panicle spiked-contracted : spikelets large (^' long). 



10. C. aren^ria, Roth. (Sea Sand-Rekd) Culm stout and rigid 

 (2° -.3° high) from firm running rootstocks ; leaves long, soon involute; panicle 

 contracted into a dense cylindrical spike (.5' -9' long) ; hairs only one third of 

 the length of the palet. (Arnndo, L. Psamma, Beanv.) — Sandy beaches. 

 New Jersey to Maine, and northward, and on the Great Lakes. Aug. (Eu.l 



14. ORYZbPSIS, Michx. Mountaix Rice. (PI. 8.) 



Spikelets 1-flowcrcd, nearly terete. Glumes herbaceous or thin-memhrana- 

 ceous, several-nerved, nearly equal, commonly rather longer than the oblong 

 flower, which is deciduous at maturity, and with a \cry short obtuse callus or 

 scar-like base Lower palet coriaceous, at Irngth involute so as closely to enclose 

 the upper (of the same length) and the oblong grain; a simple untwisted and 

 deciduous awn jointed on its aj)cx. Stamens 3. SquamulsB "J or 3, conspicuous. 

 Stigmas plumose. — Perennials, with rigid leaves and a Uiirrow raceme or 



