560 GRAMINE^E. (GRASS FAMILY.) 



lower palea entire; leaves large (l-2 long, J' to ' wide). Wet meadows, 

 &c. ; common northward. July. Culm stout, upright, 3 - 5 high. (Eu.) 



# # # Spikelets linear ('-!' long), terete, pale, oppressed on tlie branches of the 

 long and narrow racemose panicle: palece minutely roughish ; the upper 2-toothed : 

 stamens 3: squamulie unilateral or united: ligule lony : culm flattened, ascending 

 from a rooting lane. (Glyceria, R. Broicn.} 



7. G. flUitailS, R. Brown. Spikelcts 7- 13-flowercd ; lower palea oblong, 

 obtuse, or the scurious tip acutish, entire or obscurely 3-lobed, usually rather 

 longer than the blunt upper one. (G. plicata, Fries.) Shallow water; com- 

 mon, especially northward. June - Aug. Culm thickish, 1 - 5 long. Leaves 

 short and rather broad, very smooth. Panicle llong: the simple branches 

 appressed, finally spreading below. (Eu.) 



8. G. aciltiflora, Torr. Spikelcts 5 - 1 2-flowered, few and scattered; 

 lower palea oblong -lanceolate, acute, shorter than the long tapering point of the upper 

 one. Wet places, Penn. to New England ; rather rare. June. Resembles 

 the last; but the erect leaves smaller, the separate flowers twice the length ($' 

 long) and less nerved. 



\ 2. HELE6CHLOA, Fries. ( Sclerochloa, ed. 1 . ) Lower palea inconspicuously 

 or obsoleteli/ 5-nerved : stigmas nearly sessile and simply plumose: grain hardly 

 grooved : saline species : panicle contracted with age. 



9. G. maritima, Wahl. (SEA SPEAR-GRASS.) Sterile shoots procum- 

 bent runner-like; flowering culms erect (l-lj high); branches of the panicle, 

 solitary or in pairs ; spikelets oblong or linear, 4 - 8-flowcrcd ; lower palea round- 

 ed at the summit, slightly pubescent towards the base ; leaves somewhat invo- 

 lute; ligule elongated. (Poa maritinia, Iluds.) Sea-coast; not rare. (Eu.) 



10. G. d&Stans, Wahl. Culms gcniculate at the base, ascending, des- 

 titute of running shoots; branches of the panicle 3-5 in a half whorl, spreading; 

 spikelets 3 - 6-flowered ; lower palea truncate-obtuse ; leaves mostly flat ; ligule 

 short. (P. fasciculata, Torr. P. distans, L. P. arenaria, Retz ) Salt marsh- 

 es along the coast. Probably only a form of the last. (Eu.) 



32. BKIZOPYRUM, Link. SPIKE-GRASS. 



Spikelcts and numerous flowers compressed, crowded in a densely spiked or 

 capitate panicle. Glumes herbaceous or membranaceous ; the lower faintly 

 many-nerved. Lower palea rather coriaceous, flattcncd-boat-shaped, indistinctly 

 many-nerve-.], acute. Ovary stalked. Flowers mostly dioecious, pretty large. 

 Leaves crowded on the culms, im r olute, commonly rigid. (Name compounded 

 of Briza (No. 35), and Trupdy, wheat.) 



1. 15. $picatuni, Hook. Culms tufted, from creeping rootstocks (9'- 

 18' high); spike oblong, flattened (!' long); spikelets ovate or oblong, j>- 10- 

 flowered ; flowers smooth and naked ; grain pointed. (Uniola spicata, L. Poa 

 Michauxii, Kuntli.) Salt marshes and shores. Aug. Pistillate flowers more 

 rigid and almost keeled, with very long plumose stigmas ; the sterile smaller 

 and somewhat rounded on the back. 



