616 GEAMINE^. (grass FAMILY.) 



base oftJieJirm-membranaceous lower palet, which bears near its base a twisted awn 

 of its own length. — Dry woods, Pulpit Rocks and yicinity, Huntingdon Co., 

 Pennsylvania, Prof. T. C. Porter. 



7. C. Fickeringii, Gray. Culm 1°-1J° high; leaves short; panicle py- 

 ramidal, purplish; glumes ovate-oblong, bluntish or bluntly pointed (lJ"-2" 

 long); hairsbothofthejiower and of the rudiment very sAort and scanty, one fourth 

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

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

 awn. — White Mountains, New Hampshire, in the alpine region of Mt. Wash- 

 ington [Dr. Pickering, &c.) ; and a more luxuriant form with smaller spikelets 

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



§ 2. CAIjAMOVILFA. Glumes and egual palets rather chartaceous, compressed- 

 keeled ; the lower glume shorter than the upper and shorter than the palets, of whicl\ 

 the lower is l-nerved and entirely awnless: the upper strongly 2-keeled: rudiment 

 of second flower wanting : panicle open and loose. 



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

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

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

 bristly-bearded cdong the keels. (Arundo brevipilis, Torr.) — Sandy swamps, pine- 

 barrens of New Jersey : rare. Sept. — Culm3°-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 thread- 

 like point ; branches of the pyramidal panicle smooth ; glumes lanceolate, the uJ3- 

 per as long as the similar palets, the lower one fourth shorter ; the copious hairs 

 more than Imlf the length of the naked palets. — Sands, along the upper Great Lakes, 

 from lUinois and Michigan northwestwai'd.. Aug. — Spikelets 2^" long. 

 Sheaths clothed with deciduous wool. 



§3. AMM6PHILA, Host. Rudiment of second flower present and plumose above : 

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

 aceom, lanceolate, compressed-keeled: lower palet 5-nerved, slightly mucronate or 

 obscurely aioned near the tip ; the upper 2-keeled : sguamulm lanceolate, much longer 

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



10. C. areniria, Roth. (Sea Sanb-Reed.) 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. (Arundo, L. Psamma, Beauv.) — Sandy beaches, 

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



14. ORYZOPSIS, Michx. Mountain Rice. (PI. 8.) 



Spikelets 1 -flowered, nearly terete. Glumes herbaceous or thin-membrana- 

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

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

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

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

 deciduous awn jointed oii its apex. Stamens 3. Squamulae 2 or 3, conspicuous. 

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



