ORDER 155. GRAMINEJE. 387 



capillary branches ; gl. unequal, shorter than the pales ; beard very short, not half 

 the length of the pales. 2f Sandy swamps, N. J. : rare. Sept. 



2 C. loiigifolia Hook. Stout, 9-4f; Ivs. rigid, involute, long-filiform-pointed; upper 



glume as long as the pales ; hairs half as long. Shores of the great lakes. Ang. 



3 C. Caiiadeusis Beauv. (c) Blue-joint. Rigidly erect, 3 5f; leaves flat; panicle 



oblong, its branches in 4's and 5's ; gl. longer (H'O than the pales, purplish ; awn from 

 the middle of the pale, as fine as the long beard. A good grass : common N. July. 



4 C. Laiigsdorfii Trin. Spikelets 2" long ; awn stonter than the soft beard. Other- 



wise like No. 3. White Mts., N. II., Isle Royal, L. Sup. (Porter). August. 



5 C. coiifinis Nutt. (a) Lvs. flat, panicle narrow, dense, reddish; gl. ovate, 2", 



equaling the flower (b) ; beard i shorter than the pales ; awn from below the middle, 

 not exserted. Culm 2 5f. Penn. (Jackson), Penn Yan, N. Y. (Sartwell). July. 



6 C. stricta Trin. Differs from No. 5 only in its rigid leaves rolled at the point, its 



awn from below the middle, its beard as long as the pales. Lakes, N. Aug. 



7 C. NiittalHaiia Steud. Lvs. flat; pan. dense; glumes 3", long-pointed, -J longer 



than the pales ; awn from near the tip of the pale ; beard some shorter than the pale. 

 Swamps, Mass, to N. Car. (C. coarctata Ton-.; Aug. 



8 C. purpurascens Br. Culm 1 Iff; pan. spike-like, 37', purplish; gls. rather 



obtuse, less than 2" ; beard scanty, short, i as long as the rudiment, i as long as the 

 pales ; awn short, straight. White Mountains, N. H.. Mt. Marcy, N. Y. (Peck.) 



9 C. Porter! Gr. Slender, 2 4f; Ivs. flat; pan. very narrow, 46' ; glumes fully 2", 



exceeding the pale? ; hairs few, short, almost none at the base of the lower pale ; awn 

 contorted. Huntingdon Co., Penn. (Porter). July. 



10 C. areiiaria Roth. Sand Reed. Rhizomes creeping extensively, culms stout, 

 erect, 2 4f; Ivs. rolled and rush-like ; pan. spike-form, with erect appressed branches 

 610'; spkl. very flat. Sandy beaches, northward. August. 



11. ALOPECURUS, L. FOX-TAIL G. Spike- 

 lets 1-flwd. Gl. flat-keeled, connate at base, sub- 

 equal. Upper pale 0, lower flat-keeled, awned 

 on the back below the middle. Sta. 3. Panicle 

 contracted into a cylindric dense spike. 



1 A. aristulatus MX. Wild F. Ascending from a bent base, 1 2f, glaucous ; ppiko 



lender, 12' by 2i", grayish; glumes (a) and pale obtuse, equal ; awn (6) scarcely 

 exserted (c. ovary and stigmas). In wet places. June August. 



2 A. gciiiculatiis L. Bent F. Ascending from a bent base, 1 2f; spike 2 2f ; 



upper leaf scarce longer than its sheath : glumes pubescent, obtuse ; awn geniculatc, 

 far surpassing the culm. Wet meadows, East. 



3 A. pratense L. Meadow F. Erect, stout, If 2Jf; spike about 2'; upper leaf 



shorter than its sheath ; gl. ciliate ; awn twisted, nearly thrice longer than its pale. 

 Fields and pastures, Northern States. A good grass. 



12. PHLEUM, L. CAT-TAIL G. Glumes equal, 

 Hat-keeled, mucronatc or rostrate, longer than the 

 truncate awnless pales. Compound spike cylindric 

 and very dense. June, July. 



1 P. pratense L. Timothy. Herd's G. (a) Erect, rigid, 



'2 4f ; Ivs. broad-linear, flat ; glumes alike cuspidate, in a 

 long dense terete green spike. A grass of the highest value 

 for hay in the North, but will not flourish South. 



2 1*. alpinum L. Erect, If; Ivs. shorter than the sheaths; spike oblong-ovoid, 4 5' 



long ; awns as? long as their glumes. White Mountains, and Arctic Am. 



13. CRYPSI3, Ait. Compound spk. oblong, many-bracted and sheathed 



