548 GRAMINEJE. (GRASS FAMILY.) 



f 2. CALAMf, VILFA. Glumes and c<p/al ^alm- rat/n / rharlncmns, compressed 

 keeled; the lower glume sltortrr than tin-. npj>cr and shirt, r (linn the pa/r, <>f n-hich 

 tke lower is l-nerved and entirely awnles^; the u/>/r simm/iy -2-k< eUd: rudiment 

 wanting : panicle oj>< n and loose. 



5. C. bl'CVipiliS. IJranches of the ditl'u<e pyramidal panicle capillary 

 (purplish) ; yliinics orate, mucronate ; the upper slightly, the lower nearly one half, 

 shorter than the;>c//w, which are aborc tiric, the length of the hairs and bristly-beard- 

 ed along the keels. (Arundo brevipilis, Torr.) Sandy swamps, pine barrens of 

 New Jersey; rare. Sept. Culm slender, 3- 4 high : leaves nearly flat. 



6. C. Joilgifolia, Hook. Culm (l-4 high) stout, from thick running 

 rootstocks; leaves rigid, efon</al<tl, inco/itlr. above and tapering into a long thread- 

 like point; branches of the pyramidal panicle smooth; glumes htnnolatc, the 

 upper as long as the similar palca-,, the lower .[ shorter; the rojn'oun hair* mure 

 than half the lonjth of the nahd }><r!e<i . Sandy coast of IS 1 . Michigan, and north- 

 westward. Spikelets I' long. Sheaths clothed with deciduous wool. 



$ 3. AMMOPHILA, Host. Glumes nearly eyual and rather lon<jtr t/xtn the equal 

 similar palece, scarious-chartaceoits, lanceolate, compresstd-keded : lower palta 5- 

 nerved, sliyhtly mucronatc or obscurely aicncd near the tip; the upper 2-keeled: 

 rudiment present and plumose above : sijtutmtthe lanceolate, much /onaer titan the 

 ovary : panicle spiked-contracted : ,y '//>-/< -/.s- lar</<>. (.\' IOIKJ). 



7. C. arciinria, Kotli. (SEA SAXD-HKBD.) Culm rigid (2 -3 high) 

 from stout running rootstocks; leaves long, soon involute; panicle contracted 

 into a dense cylindrical spike (5' -9 long) ; hairs only the length of the pa- 

 leae. (Arundo, L. Psamma, Bemiv.) Sandy beaches, New Jersey to Maine, 

 and northward ; also Lakes Michigan and Superior. Aug. (Eu.) 



13. ORYZOPSIS, Michx. MOUNTAIN RICE. 



Spikelets 1 -flowered nearly terete. Glumes herbaceo-membranaccous, sev- 

 eral-nerved, nearly equal, commonly rather longer than the oblong flower, which 

 is deciduous at maturity, and with a very short obtuse callus. Lower palea cori- 

 aceous, 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 on its 

 apex. Stamens 3. Squamulae 2 or 3, conspicuous. Styles sometimes united : 

 stigmas plumose. Perennials, with rigid leaves and a narrow raceme or panicle. 

 Spikelets greenish, rather large. (Name composed of of)va, rice, and o\//-ty, 

 likeness, from a fancied resemblance to that grain.) 



* ^ Styles distinct, short : cnlm leaf if to the summit : callus (jlabrous. 



1. O. mclailOCl&rpa, Muhl. Leaves lanceolate, taper-pointed, flat; 

 sheaths bearded in the throat ; panicle simple or sparingly branched, the branches 

 divergent; Spikelets loose! v racemed ; aim thrice, the length of the blackish palece 

 (nearly 1' long). (Milium racemosum, Smith. I'iptatliiTtim nigrum, Torr.) 

 Rocky woods ; not rare. Aug. Culm 2-3 high. 



* * SV///rs united b> loir, slender : minis tnf'tl, naked abore : callus bearded. 



2. O. SIS peri folia, Michx. Culms (9'- 18' high) clothed with sheaths 

 bearing a mere rudimentary blade, overtopped by the long and rigid linear leaf 



