446 GRAMINACE,E. 



var. major Torr. : taller ; leaves broad-linear, and with the sheaths 

 smooth ; panicle more dense. 



Moist woods. N. Y. to Car. May, June. ^l\ . Culm about 2 feet high, 

 simple. Leaves short, flat. Panicle 48 inches long, very slender, with yel- 

 lowish-green spikelets. Pennsylvanian Kcderia. 



2. K. truncata Torr. : leaves and sheaths smooth or pubescent ; panicle 

 oblong, contracted ; branches short, racemose ; spikelets somewhat cluster- 

 ed, 2-flowered ; upper glume broad-obovate, very obtuse or truncate ; upper 

 palea smoothish. Holcus stritutus Linn. Aira truncata MiM. 



Dry woods. N. Y. and Mass, to Car. June. 7J-. Culm about 2 feet high, 

 slender. Leaves lance-linear, flat. Panicle 35 inches long, rather dense, nar- 

 row. Perhaps not distinct from the preceding. Truncated Koderia. 



44. DACTYLIS. Linn. Orchard Grass. 



(From the Greek (JuKruAoj, &jinger ; in allusion to the form of the spike.) 

 Spikelets 2 7-flowered, aggregated, subsecund. Glumes 

 unequal ; the larger keeled, mucronate. Paleae herbaceous, 

 mucronate ; the lower 5-nerved, with a fringed keel ; upper 

 bifid. Stigmas plumose. Panicle contracted, glomerate. 



D. glomerata Linn. : panicle distantly branched, somewhat secund ; 

 spikelets 3 4-flowered, in dense unilateral clusters at the ends of the 

 branches. 



Fields and meadows. N. Y. and Mass, to Car. June. %. Culm 2 3 feet 

 high. Leaves broad-linear, acuminate, rough. Panicle glaucous, contracted, 

 somewhat secund ; the clusters ovate, or lance-oblong. Introduced from Europe, 

 where it is sometimes cultivated for cattle. -It is thought, however, to be infe- 

 rior to Timothy. Rough Orchard-grass. 



45. TRICUSPIS. Beauv. Tricuspis. 



(From the Latin ires, three, and cuspis, a point ; in allusion to the lower palea.) 

 Spikelets nearly terete, many-flowered. Glumes shorter 

 than the flowers. Lower palea bifid at the apex, and tricuspi- 

 date by the projecting keel and marginal nerves, the base and 

 sides villous ; upper palea slightly bicuspidate. Panicle com- 

 pound, spreading. 



T. seslerioides Torr. : panicle loose, spreading ; branches flexuous, 

 smooth; spikelets ovate-lanceolate, 5 G-flowered, nearly terete, shining. 

 Poa seslerioides Mich. P. quinqueftda Pursk. Windsoria poceformis Nutt. 



Sandy- fields. N. Eng. and N. Y. to Car. Aug. r l\.. Culm 35 feet high, 

 erect, smooth- Leaves long, flat, nerved, the sheaths bearded at the throat. 

 Panicle very large, at length spreading and pendulous, usually purple. It is a 

 harsh grass, but is sometimes cut for hay. Tall Red-t^p. 



46. FESTUCA. Linn. Fescue Grass. 



(Said to be derived from the Celtic fest, signifying/corf, pasturage.) 

 Spikelets oblong, 3 many-flowered ; the flowers distichous, 



