9& TRIANDRIA. DIGYNIA. ALofEcuRus. 



hairy. Linn a: us remarks that the awii in the former is va- 

 riable in length, being sometimes longer, sometimes shorter 

 than the corolla. The A. geniculatus of this country differs 

 from that of Europe in having the styles connate at the base. 

 The specimens which I examined were, however, in a young 

 state; perhaps when the plant is mature the styles become 

 distinct. The American variety may be the A, borealis of 

 TriniuSyVi\\\c\\ species is thus characterized: — " ./^ pani- 

 eula oblongo-cylindrica,gluniis dfniiformi-acutis, basi connatis, 

 undique sericeis^ corolla obliqup truncata {barbata •) sty lis infra 

 eonnatis. Hab. in Asii et America boreali." Tr i n. 1. c. p. 58 



17. PHLEUM. L. 



Cahjx 2-valved, much longer than the corolla; 

 glumes equal, boat-shaped, rostrate or mucronate. Co- 

 rolla 2-valve(i, included in the calyx, awnless, truncate. 

 Geii. pi. 109. Nu 1 1. Gen. I. p. 50. Ju s s. p. 29. 

 Roem. ^ Schult. Gen. 233. P.deBeauv. t.VII. 

 f. 4. Tri?2. Agrost.15, /'a/zic/(? spiked, dense, cy- 

 lindric. Cat's- tail grass. 



F.pratenf^e L.: spike cylindric ; calyx mucronate-awned; 



keel ciliate ; awn shorter than the calyx ; culm erect. Will d. 



Spec. I. p. 354. S mi t h F I. Brit. 1. p. 68. Eyig. Bol. 1. 1076, 



Roem. <^ Schult. H. p. 378. Pursh Fl. 1. p. 65. 



Elliott Sk. I. p. 110. Mnhl. Gram. p. 82. 



Root perennial, fibrous, sometimes bulbous. Culm 2 — ^^3 feet 

 high, simple, smooth, terete. Leaves flat, 3 — 4 lines wide, 

 smooth and glaucous. Sheaths smooth. Stipule obtuse, mem- 

 branaceous, at length lacerate. S/ii/ce 3 — 6 inches long, cylin- 

 dric, green. Calyx nearly equal, 3-nerved, fringed with white 

 hans on the keel. Corolla concealed in the calyx; inferior 

 valve larger, 5-nerved. Stainens 3 ; anthers purple. Styles 

 distinct; stigmas plumose, white. Seed oblong. 

 Hah. In fields and pastures. June — August. Introduced from 

 Europe. 



18. CYNODON. Richard. 



Spikes digitate or fascicled. Flowers unilateral, in 

 a simple series. Calijx 2-valved ; glumes nearly equal, 

 spreading, acute. Corolla 2-valved; superior valve 

 very narrow, surrounded by the inferior one. Riidi- 

 ment minute, pedicellate. Nectaries collateral. Rich. 

 in Pers. Syn. I. p. 85. Nutt. Gen. I. p. 56. Roem, 

 £s? Schult. Gen. 248. P. de Beauv. t. IX. f. 1. 

 Trin. Jgrost. 52. Digit aria Juss. Panicum 

 ^" Bermuda grass. 



