664 GRAMINE^. 



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

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

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

 Blacls Mountain, North Carolina {Canby). 



EEAGEOSTIS, Beauv. 



E. Brownei, Kunth. Low (6'- 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- 

 tinger). — Probably a form of E. megastachya, 



BKOMUS, L. 



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

 than the upper one, not longer than its awn ; otherwise like B. secalirma, 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 (6' or more), erect or nodding, exserted ; 

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

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

 3° -4° high. Leaves broadly linear. 



HOEDETJM, L. Barley. 



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

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

 Glumes 2 before each spilcelet, unequal, awned. Pales 2, the lower one 

 awned. Stamens 3. Grain adhering to the paleas. 



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

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

 and waste ground. Introduced. 



AIBA, 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. earyophyllea, 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. 



