GRAMINACE.E. 443 



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

 linear-lanceolate, 12 20-fiowered ; flowers acuminate, smooth ; lower palea 

 3-nerved. 



Swamps. N. Eng. and N. Y. to Flor. W. to Miss. July, Aug. (J). 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. 'JJ-. 

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

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



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

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

 flowers rather obtuse, indistinctly 5-nerved. 



Salt marshes. Near Boston. Mass. June. 1}.. Root creeping. Culm 8 12 

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

 sometimes purplish. Sea Meadow-grass. 



16. P. brevifolia MM. : culm oblique ; leaves very short ; ligule acumi- 

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

 palese pubescent. 



Woods. Penn. Muhl. April. ^4-- Culm about 2 feet high, somewhat an- 

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



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

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

 smooth. P. glomeraia Walt. 



Penn. Schwcinitz. S. to Car. 9J.. 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- 

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

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

 equal. Briza Eragrostis Linn. Megastachya Eragrostis Beauv. 



Sandy fields, road sides, &c. N. Eng. and N. Y. to Flor. July, Aug. (p. 

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

 roughish above. Panicle pyramidal ; the branches subdivided, short and flex- 

 uous. Introduced from Europe, and now extensively naturalized ; but it is of 

 little or no value for pasturage. Quake-grass. 



19. P. Michauxii Kunth: culms cespitose, erect; leaves distichous, 

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

 5 9-flowered, smooth; lower palea about 9-nerved. (Torr. N. Y. Fl.) 

 Uniola spicata Linn. Festiica distichophylla Mich. 



Salt marshes. Mass, and N. Y. to Car. W. to the North West Coast. Aug., 

 Sept. ^| .Root creeping extensively. Culms 1218 inches high, branched at 

 base. Leaves numerous, slightly glaucous. Panicle contracted, in a dense 

 gpike. Michaux's Meadow-grass. 



