34 TRIAND. DIGYN. 



almost entirely ribless, linear-oblong, rather distant, smooth,, 

 bluntish. 



7. P.compressa (creeping Meadow-grass), panicle subsecund 

 spreading (afterwards subcoarctate), spikeiets oblongo-ovate 

 of from 5 7 obtuse flowers connected by a web, culm com- 

 pressed, root creeping. 



HAB. Walls, Melrose Abbey, Lightf. Walls about the King's Park, 

 Edinb., Maugh. Walls and in dry pastures about Glasg., very rare, 

 Hopk. Common about Edinb., Mr. Arnott. Fl. July, Aug. If. . 



One foot or more high, subglaucous. Culms compressed, at the base 

 procumbent. Leaves short, linear, acute. Ligitle very short, blunt. 

 Panicle not much branched. Cal. valves ribbed, acute, halves of 

 cor. obtuse, outer one very obsoletely ribbed; the lower florets 

 webbed at the base. 



8. P. alpina (alpine Meadow-grass), panicle diffuse, spikeiets 

 ovate of 4 5 acute flowers hairy below (but not webbed), 

 leaves broadly linear obtuse, ligule of the upper leaves oblong 

 acute of the lower ones short obtuse. Lightf. p. 96. E. B. 

 1. 1003. 



/3. glomerata, spikeiets crowded. D. Don's MSS. ined. 



HAB. Common upon elevated mountains in the Highlands. ]3. Banks 

 pf the Esk, G. Don. Fl. July, Aug. If. . 



Six to twelve inches high, nearly erect. Leaves short, linear, obtuse 

 with a very small mucro. Spikeiets rather large, close. Cal. valves 

 ovate-lanceolate, much compressed ; dorsal rib scabrous, termi- 

 nating in a very sharp point or short awn, with a short lateral rib 

 or nerve at the base. Ext. valve of cor. ovato-lanceolate, acute ; 

 dorsal rib scabrous, no lateral ones ; lower part villous ; upper part 

 glabrous, purple ; margin diaphanous : int. valve notched or bifid 

 at the extremity. This grass is very frequently viviparous. 



9. P. laxa (slender Meadow-grass), panicle contracted lax 

 slightly drooping, spikeiets ovate of about 3 flowers which are 

 acute connected by a web, leaves narrow linear-acute, ligules 

 all lanceolate. Willd. Sp. PL p. 386. E. B. t. 1123 (P.Jiex- 

 uosa) . 



HAB. Ben Nevis, Mr.J. T. Mackay. K.July. I/. 



A very slender subglaucous grass, scarcely able to support the weight 

 of its panicle, which consequently droops slightly. Leaves more 

 numerous than in A. alpina, and much narrower. Florets very ob- 

 scurely ribbed, all very acute, green" and purple, with diaphanous 

 margins. Cal. valves nearly equal, pubescent on the keel, as is the 

 cor. which is also webbed. 



10. P. Cfssia (sea-green Meadow -grass), "panicle spreading, 

 spikeiets ovate 5-flowered, glumes lanceolate silky-edged un- 

 connected by any web, stipule (limile) very short and blunt." 

 Sm.iaE.B. M719. 



HAB. Scotland, Mr. Fairburn. Ben Lawers and other Highland 

 fountains, Mr. J. T. Mackay. Rocks of Ben Lawers and. Clova 

 mountains of Aberdeenshire, not rare, G. Don. Fl. June, July, ty . 



