» 



DIADELPHIA— DECANDRIA. Trifolium. 303 



equal. Stipulas tapering, converging. Two upper calyx- 

 teeth rather the shortest. 



T. medium. Linn. Fatai. Suec.ed. 2. 558. Huds. ed.\. 284. JVilld. 



V. 3. 1 367. Fl. Br. 786. Engl. Bot. v. 3. 1 90. Mart. Rust. t. 2 



Dicks. H. Sicc.fasc. 4. 10. Sincl. ed. 2. 218./. Hook. Scot. 218. 



Fl. Dan. t. 1 273. 

 T. flexuosum. Jacq. Justr. t.386. Retz. Prodr. 174. Ehrh.Herb.58. 

 T. alpestre. Huds. 326. 

 T. n.376. Hall. Hist. \ 63. 

 T. purpureum majus, foliis longioribus et angustioribus, floribus 



saturatioribus. Raii Syn. 328. 

 T. folio longiore, flore purpureo. Riv. Tetrap. Irr. t. 12. f. 1. 



In elevated dry chalky pastures, or in gravelly ones with a clay 

 bottom. ' • 



Perennial. July. 



In general appearance this is very like the last species, but its qua- 

 lities are widely different, though for some purposes, according 

 to Mr. Sinclair, not inferior. Mr. Afzelius, in his most elabo- 

 rate paper in the Linnsean Transactions, has clearly distinguish- 

 ed them. The root of the present plant is creeping and more 

 uniformly perennial in cultivation. The stems are zigzag, and 

 more branched. Stipulas longer, linear, tapering to a point, 

 and stand parallel to each other. Heads of Jlowers rather larger 

 and less dense. Cal. slightly hairy, except in the mouth ; its 

 2 upper teeth shortest ; the rest gradually, but not very strik- 

 ingly, longer. Leaflets elliptical, various in width, a little glau- 

 cous underneath, chiefly hairy at the margin. 



The best properties of the present kind of Clover, or Trefoil, seem 

 to be its power of resisting drought, and its thriving on cold te- 

 nacious soils. Yet Mr. Sinclair reports it to be preferable to 

 T. pratense for permanent pasture on light soils. Its produce 

 of nutritious matter however is said to be but half as much as 

 that of T. pratense. 



9. T. mariti?nmn. Teasel-headed Trefoil. 



Spikes ovate, somewhat hairy. Stipulas lanceolate, erect. 



Calyx-teeth after flowering dilated, leafy, and spreading. 



Leaflets obovate-oblong. 



T. maritimum. Huds. ed. 1 . 284. Willd. v. 3. 1370. Fl. Br. 786, 



Engl. Bot. V. 4. t. 220. Dicks. H. Sicc.fasc. 7. 8. Hook. Lond. 



t. 57. 

 T. stellatum. Huds. ed. 2.326 ; not of Linnceus. 

 T. stellatum glabrum. Raii Syn. 329. Ger. Em.l208.no f. Pluk. 



Almag. 376. Plujt. t. 113./. 4. 

 •T. spicatum minus, flore minore dilute purpureo. Moris, v. 2. sect. 



2. 1. 14. f; no descr. 



In muddy salt-marshes. 



