GRAMINACE^. 443 



somewhat simple, ovate ; spikelets approximated on the short branches, 

 iinear-lanceolate, 12— 20-flowered ; flowers acuminate, smooth ; lower palea 

 3-nerved. 



Swamps. N. Eng. and N. Y. to Flor. W. to Miss. July, Aug. Q.—Culm 

 6 — 18 inches long, creeping and rooting at the joints. Leaves subulate, flat, 

 pubescent above. Panicle 1—2 inches long, with the spikelets much com- 

 pressed. Creeping Meadow-grass. 



14. P. dentata Torr. : culm oblique or decumbent ; panicle loose, some- 

 what spreading ; branches capillary, flexuous ; spikelets lanceolate, about 

 5-flowered ; flowers rather distant ; glumes unequal, the upper 3-nerved and 

 obtuse ; lower palea 5-nerved, at length 5-toothed at the apex. 



Wet sandy places. N. Eng. and N. Y. W. to Ohio. June, July. '4-.— 

 Culm 1—3 feet long, rooting at the lower joints. Leaves flat, pale green. Pan- 

 icle large, weak, nodding when young. Toothed Meadow-grass. 



15. P. mariiima Huds. : culm somewhat geniculate ; leaves convolute ; 

 panicle erect, somewhat crowded ; spikelets hnear, about 5-flowered, terete ; 

 flowers rather obtuse, indistinctly 5-nerved. 



Salt marshes. Near Boston. Mass. June. %.—Root creeping. Ctdm 8—12 

 inches higli, rigid. Leaves somewhat pungent, glaucous. Panicle rigidly erect, 

 sometimes purplish. Sea Meadow-grass. 



16. P. brevifolia Muhl. : culm obUque ; leaves very short ; ligule acumi- 

 nate ; panicle loose ; branches in pairs, horizontal ; spikelets 3 — 4-flowered ; 

 paleiE pubescent. 



Woods. Penn. Muhl April. %.—Culm about 2 feet high, somewhat an- 

 gular. Panicle loose,'flexuous. Short-leaved Meadow-grass. 



17. P. conferta Ell. : culm erect, geniculate ; panicles terminal and ax- 

 illary, erect; spikelets about 8-flowered, compressed; flowers clustered, 

 smooth. P. glomerata Walt. 



Penn. Schwcinitz. S. to Car. %.—Culm 2—3 feet high. Leaves smooth, 

 flat, serrulate on the margin. Panicles 4—8 inches long. 



Clustered Meadow-grass. 



18. P. Eragrostis Linn. : culm oblique ; sheaths smooth ; panicle spread- 

 incr, pyramidal ; the lower branches hairy in the axils ; spikelets ovate-ob- 

 long and linear-lanceolate, 8— 30-flowered ; flowers obtuse ; glumes nearly 

 cqiral. Briza Eragrostis Linn. Megastachya Eragrostis Bcauv. 



Sandv fields, road sides, &c. N. Eng. and N. Y. to Flor. July, Aug. (1).— 

 Culm 12—18 inches long, geniculate and branching at base. Leaves narrow, 

 rouahish above. PanicU pyramidal ; the branches subdivided, short and flex- 

 uoul Introduced from Europe, and now extensively naturahzed ; but it is ot 

 rude or no value for pasturage. Quake-grass. 



19 P Michauxii Kunth: culms cespitose, erect; leaves distjphous, 

 spreading ; panicle contracted, spiked ; spikelets ovate or ovate-oblong, 

 5— 9-flowered, smooth; lower palea about 9-nerved. {Torr. N. Y. Fi.) 

 Uniola spicata Linn. Festuca distichophylla Mich. 



Salt marshes. Mass. and N. Y. to Car. W. to the North West Coa.st. Aug 

 Sepf ^l -Root creeping extensively. Culms 12-18 mches high, branched at 

 ££ Aa.. numerous, slightly glaucous. ^^^^ZX^aZ^^' 



