106 TRIANDRIA— DIGYNIA. Aira. 



Graves Br. Gr. t. 44. Hook. Scot. 30. Schrad. Germ. v. 1. 262. 



FL Dan. t. 383. Ehrh. Phijt. 8 1 . 

 Gramen parvum pi'cecox, spica laxa canescente. Pluk. Alrn. \77 . 



Phijt. t. 33./. 9. Rail Sijn. 407. t. 22. f. 2. 

 G. minimum, spica brevi habitiore, nostrum. Rail Sijn. ecL 2. 253. 



Scheuchz. Jgr. 219. 



Common on dry gravelly ground. 



Annual Maij, June. 



Roof, of numerous long capillary fibres. Stems several, tufted, from 

 2 to 5 inches high, simple, erect, leafy, smooth. Leaves short, 

 bluntish, narrow, channelled, pale green, roughish, with tumid, 

 angular, smooth sheaths. Stipula lanceolate, closely embracing 

 the stem. Panicle erect, an inch long, compound, with angular 

 rough stalks. FL large in proportion to the panicle, pale green 

 or purplish. Cat. with a rough keel. Cor. smooth, except at the 

 very bottom, just above which the jointed awn of the outer 

 valve of each floret originates, and extends almost twice the 

 length of the calyx. u4nth. smal];^pale, Stigm. feathery, nearly 

 sessile. Seed cylindrical, clothed with the membranous cloven- 

 pointed corolla, which is minutely bristly at the base. 



This trifling grass is of no agricultural use. It withers away as 

 summer comes on. 



8. A. caryophyllea. Silver Hair'-grass. 



Panicle spreading, triple-forked. Florets not longer than 

 the calyx, both sessile. Av/n twice as long, from above 

 the middle of the valve. Leaves bristle- shaped, with ribbed 

 close sheaths. 



A. caryophyllea. Linn. Sp. PL 97. Willd. v. 1 . 380. FL Br. 88. 



EngL Bot. V. 12. ^.812. CurL Lond.fasc. 6. t. 6. Knapp t. 35. 



Hook. Scot. 30. StillinQjl.Misc.t.5. Graves Br. Gr.t.AD. Schrad. 



Germ. v. 1. 261. Host^Gram. v. 2. 33. ^.44. FL Dan. t. 382. 

 Avena n. 1482. Hall Hist. v. 2. 228. 

 Gramen paniculatum minimum molle. Scheuchz. Agr. 215. t. 4. 



/. 15. 

 G. paniculatum, purpuro-argenteum, locustis parvis, annuum. 



Moris. V. 3. 200= sect. 8.t.5.f. 11. Raii Sijn. 407. 

 Caryophyllus arvensis glaber minimus. Bauh. Prodr. 105./. 



On barren sandy heaths or hillocks, common. 



Annual. June, July. 



Root small, fibrous. Stems 4 to 6 inches high, with a few slender 

 leaves about the lower part, whose sheaths are smooth, purplish, 

 ribbed and striated, but not tumid and angular like the preceding. 

 Stipula lanceolate, taper-pointed. Panicle capillary, with mostly 

 ternate branches, which are nearly smooth, often purple, and a 



