ORDER 155. GRAMINE^E. 



2 IT. pani<alata L. Sea-side Oats. Culm 4 8f ; Ivs. long, narrow, rolled, fringed 



at throat , ^pikelets ovate, short-pedicelled, 12-20-flwd. ; lower pale obtuse, 9-veined; 

 stamens 3. 2; Sand-hills, coastward, Va. to Fla. July. 



3 U. iiitidtt Baldw. Culm wiry, 2 3f; Ivs. narrow, flat; pan. simple ; spkl. subsets- 



sile, broad, with about 7 long-pointed fls. Sta. 1. 11 Ga. to La. 



4 U. jgracllls MX. (d) Slender, 3 if; Ivs. broad-linear, flat; pan. long, simple, 



branches solitary, appressed; spkl. () 2", 3-4-flwd. Sea-coast, N. Y., and South. 



50. PHRAGMITES, Trin. REED. Fls. 36, the 

 lowest sterile and monandrous ; rachis beset with long 

 silky hairs. Gl. acute, keeled, very unequal. Lowen'J 

 pale subulate, silky villous at base. Sta. 3. Grain free.j 

 U Tall; Ivs. broad and flat; panicle diffuse. 



P. communis Trin. Culm erect, 6 12f, near V thick; Ivs. 

 12' broad; pan. effuse, spkl. (a) 4-5-flwd., erect; fls. (6) col- 

 ored, as long as the white hairs. Ponds. July. 



51. ARUNDINARIA, Rich. CANE. Spkl. flat- 



tened, 5-12-flwd., fls. all 5 , trian- 

 'drous, remote. Gl. (a) small. Lower pale lance- 

 ovate, rounded, awn-pointed. Stigmas (b) 3. Grain 

 (c) free. J) J> Tall, branching, leafy. Flowers in 

 spikes or panicles. 



A. macrosperma MX. (a) Culm woody, from strong 

 running root-stocks, 10 25f high, with fascicled branches ; 

 Ivs. lanceolate. If and less ; spkl. 1 2J' long, subeessila 

 on leafless axillary or radical branches (from the rhizome) 

 Swamps, Va. to Ky., and S., forming the brakes. 

 /3. lecfa. Culm 2 10f; Ivy. lance-linear; spikes mostly 

 radical. 



52. LEPTURUS, Br. Spikelet 1 on each joint of the fili- 

 form rachis impressed into a cavity, 1- or 2-flwd. Gl. coriace- 

 c us, acute, subulate. Pales acute, subequal. Stain. 3. Grain 

 lincur, free. @ Culm branching, leaves veiy narrow. Spikes 

 solitary or panicled. 



paiifculatus N. (c) Culm ascend- 

 ing, 1018' ; Ivs. near the base, fili- \ 

 form-subulate, short : rachis f of the" 

 culm, the slender spikes 2', alternate.. 

 remote; spkl. 2", gls. lateral, shortei' 

 than the pales. Illinois to Louisiana. 



53. HORDEUM, L. BARLEY. Spkl. 3 

 at each joint of the rachis, 2-flowered, the 

 lateral imperfect or abortive. G!. 2, subulate, 

 awned, collateral, all 6 in front of the cluster 

 Lower pale long-awned, both adhering to grain 



II. jiibatum L. Squiirel-tail G. (a) Culm terete, 2f; Ivs. broad-linear; spike 

 23' long; spkl. (b) with the lateral fls. neuter, the 7 awna 6 times (2') as long an 

 <Ue flowers. @ Marshes, N. Eng. to Mo., and N. June. 



