GG iRIANDRIA.— DIGYNi 



90. ELYMUS. Lyme-grass. 



1 . E. virginicus : spike erect, coarctate ; spikelets in 



pairs, 2— 3-flowered; florets smooth ; glumes lan- 

 ceolate, nerved. 

 HAB. Banks of rivers. July — Aug. U. Culm 3 — 4 

 ft. high; leav. bright-green ; spik. stiffly erect. 



2. E. canadensis : spike nodding at the extremity, patu 



lous ; spikelets 3 — 5-flowered ; florets hairy ; 



glumes linear-lanceolate. 

 HAB. Banks of rivers. Aug. U . Root creeping 



culm 3 — 4 ft. high ; leav. dark-green; spik. gen, 



pendulous at the extrem. 

 /3. glaucifolius : leaves glaucous. 

 HAB. Rocky shores. Aug. 

 :. E. villosus: spike a little nodding at the extremity. 



patulous ; , rachis and florets hispid-pilose ; spikelets 



geminate, 2 — 3-flowered ; glumes linear, pilose-cili- 



ate, 2-nerved, shorter than the florets. 

 HAB. Dry hills. July. U . Culm 2—3 ft. high ; 



leaves long, 4 — 5 lin. broad ; spike at first erect. 

 V. E. hystrix: spike erect ; spikelets diverging ; caly\ 



0. 

 HAB. Rocky hills. July. U. Culm 3 ft. high; leav. 



often glauc; rack. flex. ; spik. 3 at each joint ; cal 



sometimes 1 — 2-leaved, or a rudiment. 



91. MELICA. Melic-grass. 



M. speciosa: smooth; panicle loose, erect, few-flow 

 ered ; branches simple ; florets obtuse. 



HAB. Mountains. June. U . Cidm 3—4 ft. high 

 leav. flat, pub es. beneath; pan. subsecund, 



92, ATHEROPOGON. 



A. apludoides : spikes racemose, distant, pendulous 

 perfect floret with the inferior valve tricuspidate 

 lateral bristles of the abortive floret half the length 

 of the terminal one. 



HAB. Rocky hills. Aug. U. Culm 18 in. high, assur 

 gent ; leav. at length involute ; spik. 20 — 40, oblong 

 sess. f a?ith. red. 



93. PANICUM. Panic-grass. 

 I P. Cms galli i racemes alternate and in pairs,, com 



