404 



ORDER 155. GRAMLNE^E. 



2 IT. paniculata L. J3ea-sid& Oats, Culm 4 Sf ; Ivs. long, narrow, rolled, fringed 



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

 stamens 3. 'H Sand-hills, coastward, Va. to Fla. July. 



3 V. iiitida. Baldw. Culm wiry, 2 3f; Ivs. narrow, flat; pan. simple; spkl. snbses- 



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



4 IT. gracilis MX. (d) Slender, 3 4f; Ivs. broad-linear, flat; pan. long, simple, 



branches solitary, appressed ; spkl. (e) 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. Loweri'/'J 

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

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



P. commit iiis Trin. Culm erect, 6 12f, near 1' thick; IVH. 

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

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



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



tened, 5-12-flwd., fls. all 2 , trian- 

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

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

 (c) free. J) 5 Tall, branching, leafy. Flowers in 

 spikes or panicles. 



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

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

 Ivs. lanceolate, If and less ; spkl. 1 2j' long, subeeesile 

 on leafless axillary or radical branches (from tlie rhizome). 

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

 /3. tecln. Culm 2 lOf ; Ivf. lance-linear; spikes mostly 

 radical. 



52. LEPTURUS, Br. Spikelct 1 on each joint of the fili- *\ / 

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

 ous, acute, subulate. Pales acute, subequal. Stain. 3. Grain *M * 

 linear, free. Culm branching, leaves very narrow. Spikes \f 

 solitary or panicled. 



paniculatns 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, ehortei' 

 than the pales. Illinois to Louisiana. 



53. HORDEUM, L. BARLEY. Spkl. 3 

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

 literal imperfect or abortive. Gl. 2, subulate, 

 awned, collateral, all 6 in front of the cluster. 

 Lower pale long-awned, both adhering to grain. 



If. jubutum L. Squirrel-tail 6. (a) Culm terete, 2f; Ivs. broad-linear ; ppike 

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

 the flowers. Marshes, N. Eng. to Mo., and N. June. 



