TRIAND. DIGYN. 25 



below the middle, arises an awn about twice the length of the valve. 

 Instead of the second valve of the cor., is an extremely minute tuft 

 of hairs, ^'ar. (3. has the panicle smaller, and the flowers, in pro- 

 portion, rather larger, yellow, but not so large as in the Agr. Jia- 

 vescens of Host, nor are the glumes so much acuminated. Far. 

 y. I cannot distinguish specifically from A. canina. — Sometimes the 

 awn does not reach to the top of the glumes, and then it is by some 

 called awnless. 



2. A. setacea {hristle^leaved Bent-grass), branches of the pani- 

 cle short erect, valves of the cal. unequal lanceolate rough at 

 the back, outer valve of the cor. with a longish awn from the 

 base, inner one ovate very minute, leaves setaceous. .E. B. 

 t. 1188. 



Hab. I have this mentioned in a list of Scotish plants, furnished by 

 Mr. D. Don, but without any particular station being given. Fl. 



Tliis grass has a pecvdiarly stifl and rigid habit. Leaves numerous, 

 bristle-shaped, glaucous. Panicle very compact, greenish brown. 

 Outer valve of cor. membranous, with 4 nerves, the 2 lateral ones 

 terminating in short teeth j awn arising from the base and exceed- 

 ing in length the larger acuminated calycine valve. This plant 

 was made known to the botanical world by Mr. Curtis, and appears 

 to be peculiar to Britain. In the structure of the flowers and leaves 

 there is the closest affinity with Agr. rupestris of the continental 

 Botanists ; but that plant is much smaller, less rigid, and the pani- 

 cle is spreading when in flower and of a fine purple. May they be 

 varieties arising from situation ? 



** Corolla awnless (or mostly so). 



3. A. vulgaris {fine Bent- grass), branches of the panicle sinooth- 

 ish, branchlets diverging, outer valve of the cor. 3-nerved, li- 

 gule extremely short and truncate. Lightf. p. 93 {A. ca- 

 pillaris). E.B.t.\67\. 



/S. Outer valve of the cor. awned. 



y. scarcely 3 inches high. A. pumila, Liglitf. p. lOSl, fig. in 

 frontispiece. 



Hab. Meadows, pastures and banks, common, Hopk. /3. Pentland 

 hills, Maugh. y. Pentland hills, Lightf. Fl. June, July. 1/ . 



P.oot creeping, throwing out many, mostly ascending, culms, 1 or 1 

 and a half foot high. Panicle purplish, rachis smooth and the branch- 

 lets nearly so. Cal. glumes lanceolate, smooth, shining, rough oh 

 the back. Cor. glume of 2 thin, delicate, membranous, unequal 

 valves. Outer one a little shorter than the cal., 3-nerved, triden- 

 tate, avvTiless i:i a, bearing an awn of uncertain length, but mostly 

 short in /3, arising from the central nerve, a little below the mid- 

 dle of the back ; inner valve half as small, two-nerved, bifid. I 

 possess specimens of this species bearing the rudiment of a second 

 flower upon a rather long footstalk in the same calyx. 



4. A. alba [Marsh Bent-grass), branches of the panicle hispid, 

 laranchlets patent, out*r yalve of the CQr. 5 -nerved, ligulc ob- 



