664 a it a mine. v.. 



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

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

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

 Black Mountain, North Carolina (Canby). 



ERAGROSTIS, Beauv. 



E. Brownei, Kunth. Low (6-12 7 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. megastaehya. 



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. serotinus, L. 

 — Mountains of Georgia, Tennessee. Introduced. 



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

 panicle ample, drooping; spikelets thin, loosely 6-9-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, 6-6-flowered ; glumes and palese 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 hase of the upper palea. 

 Glumes 2 before each Bpikelet, unequal, awned. Palea; 2, the lower one 

 awned. Stamens '.). Grain adhering to the palese. 



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

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

 and waste ground. Introduced. 



AIRA, L. 



A. CaespitOSa, L. Perennial; culms tufted (2°-4° high); leave- Hat, 



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



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



the suppressed awn. — Georgia (Leconte in Huh. Dwrand), Introduced. 



A. caryophyllca, I> Annual, low (•">'- 1<>' high); leaves Betaceonsj 

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

 awned on the hack — Waste places. Introduced. 



