6G4 GRAMTNE^. 



P. alsodes, Tiraj'. Culms weak {2° high) ; leaves narrow-linear; panicle 

 loose, tile selaceous branclios mostly by fours; spikelets '2 - 4-flowered ; 

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

 IMack Mountain, North Carolina (Canbij). 



ERAGROSTIS, Beauv. 



E. Brownei, Kunth. Low (0-12' 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, 

 o-nerved, the upper one ciliate. — East Florida (Garber), Tennessee [Dr. Gat- 

 tiiujer). — Probably a form of E. megaslachya. 



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 {10-2° long) ; leaves downy; 

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

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



ELYMUS, L. 



E. Canadensis, L. Spike long (6' or more), erect or nodding, exserted ; 

 spikelets by pairs, fj-O-flowercd ; glumes and palefe more or less rough-hairy, 

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

 3° -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. Palese 2, the lower one 

 awned. Stamens 3. Grain adhering to the paleae. 



H. pratense, Huds. Annual, 6'- 18' high ; upper sheath dilated ; lateral 

 spikelets sliortpcdicelled, awnless, the middle one long-awned. — Road-sides 

 and waste ground. Introduced. 



AIRA, L. 



A. ceespitosa, 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 (Leconte in Herb. Durand). Introduced. 



A. caryophyllea, L. Annual, low (5'- 10' high); leaves setaceous; 

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

 awned on the back — Waste places. Introduced. 



