21 TRIAND. DIGYN. 



3. Phi. Michelii (Michelian Cat's-tail-grass), panicle spiked 

 cylindrical, cal. glumes lanceolate acuminate strongly ciliated 

 at the back. E. B. t. 2265 (Phalaris alp. Host). 



HAB. Rocky parts of the high mountains of Clova, Angus-shire, G. Don. 

 Fl. July, Aug. 7/ . 



Distinguished at once from the two former species, by the gradually 

 tapering glumes. It wants the double cor. and hence Host and 

 Willdenow have fallen into an error in making it a Phalaris. 



4. Phi. arenarium (Sea-side Cat's-tail-grass), panicle spiked 

 oblongo-obovate, cal. glumes lanceolate acute ciliated at the 

 back. Lightf. p. 1080. .E. B. t. 222 (Phalaris aren.). 



HAB. Loose blowing sand, near the sea shore, Lightf. Sands of 

 Barrie, G. Don. Near Burntisland, Mr. Arnott. Fifeshire coast, 

 not uncommon, Mr* Greville. Fl. July. I/ . 



Culms 5 6 inches high, many from the same root, ascending. Cor. 

 twice as short as the cal., membranous, truncated. 



12. MILIUM. 



1. ^A.effusum (spreading Millet-grass), flowers loosely panU 

 cled awnless. Lightf. p. 92. E. B. t. 1006. 



HAB. Moist shady woods. By the Aqueduct Bridge, Kelvin. Ha- 

 milton and Lanark, Hopk. Rosslyn woods, Mr. Arnott and Mr. 

 Greville. Fl. June. If. . (0 Sm.) 



Culms 3 4 feet high, slender. Panicle diffuse, lax, delicate. Cal, 

 glumes equal, ovate, concave, glabrous, or slightly scabrous, green. 

 Those of the cor. cartilaginous, very concave, at length closely in- 

 vesting the seed, which is the principal character that distinguishes 

 this grass from Agrostis. 



J3. AGROSTIS. 



* Outer valve of the Cor. awned. 



1 . A. canina (brown Bent-grass), branches of the panicle long 

 slender erecto- patent, cat. valves unequal lanceolate rough at 

 the back, cor. of 1 valve with a dorsal awn from below the mid- 

 dle, leaves linear. Lightf. p. 93. E. B. t. 1856 (Tricho- 

 dium cans., Schrad.) . 



a. flowers purple. 



0. flowers straw-coloured, somewhat larger. 



y. panicle longer, slenderer, pale green. A. gracilis, D. Don. 

 MSS. inedit. 



HAB. a. Moist heaths and moory places, plentiful, fi. sent me by 

 Mr. Winch as gathered by G. Don, in Scotland, y. meadows 

 about Gark, Perthshire, D. Don. FL June, July. 1J. . 



Panicle lax, slender. Flowers small. Cal. valves rather acuminate, 

 glabrous, rough on the back. Valve of the cor. single ! (hence the 

 genus Trichodium of Michaux), shorter than the cal., ovate, trun- 

 cate and concave, white, thin, membranous, dotted with rough 

 points, having 4 longitudinal nerves, 2 of which (the lateral ones) 

 ften project into very short awns - ; between these, on the back, from 



