TRIAND. DIGYN. 



21. BRIZA. 



1. Br. media (common Quaking- grass], spikelets broadly ovate 

 of about 7 flowers, cul. shorter than the florets. Lightf. p. 99. 

 E. B. t.340. 



HAB. Meadows and pastures, but rare in the Highlands, Lightf. 

 About the ponds at Dongalston. At the entrance to the falls of the 

 Clyde, and about Airdrie, Hopk. Fl. June. "}/ . 



Whole plant very elegant. Culms slender, 1 foot or more in length. 

 Leaves short, linear, acuminate. Panicle a good deal branched, 

 branches thread-shaped, divaricating, purple. Spikelets tremulous 

 with every breeze, very smooth, shining, purple, more or less 

 green or greenish white at the edges. Cal. valves very concave, 

 subcompressed. Ext. valve of cor. much like the cal. but rather 

 smaller ; int. one minute, resembling a flat scale, within the larger 

 one. 



22. DACTYLIS*. 



1. D. gtomerata (rough Cock' s-foot -grass), panicle crowded 

 secund, leaves plane. Lightf. p. 99. E. B. *.385. 



HAB. Way-sides, meadows and woods, abundant. Fl. July. I/. . 



One to two feet high. Leaves rather broadly linear, acuminate, sca- 

 brous. Panicle secund. Spikelets of 3 4 flowers, thickly cluster- 

 ed on the branches, clusters ovate. Valve of the cal. membranous, 

 smaller than the cor., lanceolate, acuminate, unequal, glabrous, sca- 

 brous at the back of the valves, which are more or less obliquely 

 keeled. Ext. valve of cor. subcartilaginous, lanceolate, much com- 

 pressed, scabrous, ribbed, ciliated at the keel, with a short awn at 

 the point - } int. bifid at the extremity. 



23. CYNOSURUS. 



1. C. cristatus (crested Dog's-tail- grass], raceme spiked linear, 

 florets with a very short awn. Lightf. p. 100. E. B. t. 316. 



HAB. Dry pastures, frequent. Fl. July. 3/ . 



One to one and a half foot high, slender. Leaves narrow, linear, acu- 

 minate. Raceme secund. Involucre beautifully pectinated, one 

 at the base of each spikelet, their divisions linear, acute, greenish, 

 subglumaceous, a little curved, rough. Spikelets 3 5-flowered. 

 Cal. valves lanceolate, nearly equal, membranous, rough at the keel, 

 as long as the floret. Ext. valve of cor. lanceolate, obscurely nerv- 

 ed, green, scabrous, especially at the keel, terminating in a short 

 rough awn ; int. white, bifid, pubescent at the angles of the fold. 



3-nerved incurved at the extremity, florets lanceolate rather acute at the 



point. D. Don, Descr. of Netv or Rare Plants of Scotl. p. 6. 

 HAB. Banks of the Tay, west of Dundee, G. Don. 'Said to be totally distinct 



from any British Poa. 



a This agrees very imperfectly with the character given of Dartylit, espe- 

 cially in what concerns the cal. In reality it accords with Festuca, but the 

 clustered secund panicle indicates a diiYer-ient genus. 



