6G4 GRAMINE^E. 



P. alsodes, Cray. Culms weak (2° high) ; leaves narrow-linear; panicle 

 loose, tlu> setaceous branches mostly by fours; spikelets 2-4-flowered; 

 glumes and palea 1 acute, the lower palea hairy near the base. — Summit of 

 Black Mountain, North Carolina (Canbg), 



ERAGROSTIS, Beauv. 



E. Brownei, Kunth. Low (C-12' high), annual, tufted ; leaves linear, 

 attenuate; panicle simple, racemose, the short branches spreading; spikes 

 linear-lanceolate, nearly sessile, 20-30-flowered ; lower palea ovate, acutish, 

 3-nerved, the upper one ciliate. — East Florida (Garber), Tennessee {Dr. Gat* 

 tinyer). — Probably a form of E. megastacliya. 



BROMUS, L. 



B. racemosus, L. Panicle erect ; flowers larger, the lower palea longer 

 than the upper one, not longer than its awn ; otherwise like B. secalinus, L. 

 — Mountains of Georgia, Tennessee. Introduced. 



B. sterilis, L. Annual; culms ascending (l°-2° long) ; leaves downy; 

 panicle ample, drooping; spikelets thin, loosely 5-9-flowered, the long-awned 

 flowers linear-subulate. — Tennessee, and northward. Introduced. 



ELYMUS, L. 



E. Canadensis, L. Spike long (C or more), erect or nodding, exserted ; 

 spikelets by pairs, 5-6-flowered ; glumes and palea? more or less rough-hairy, 

 long-awned. — River-banks, mountains of Georgia, and northward. — Culms 

 8° -4° high. Leaves broadly linear. 



HORDEUM, L. Barley. 



Spikelets 3 at each joint of the terminal spike, the lateral ones imperfect, 

 the middle one 1-flowered, with a rudiment at the base of the upper palea. 

 Glumes 2 before each spikelet, unequal, awned. Palea? 2, the lower one 

 aw ned. Stamens 3. Grain adhering to the palea?. 



H. pratense, lluds. Annual, G'- 18' high ; upper sheath dilated ; lateral 

 spikelets short -pedicelled, awnless, the middle one long-awned. — Iload-sides 

 and waste ground. Introduced. 



AIRA, L. 



A. Caespitosa, L. Perennial; culms tufted (2° -4° high); leaves flat, 

 linear; panicle oblong, with erect clustered branches; spikelets 2 flowered, 

 with a bristle-like rudiment; lower palea denticulate at the tip, as long as 

 the appressed awn. — Georgia (Leamte in Herb. Durand). Introduced. 



A. caryophyllea, L Annual, low (o'-lO' high); leaves setaceous; 

 panicle widely spreading; spikelets 2-flowered, purplish; lower palea 2-cleft, 

 awned on the back — Waste places. Introduced. 



