SYNGENESIA— POLYG.-SUPERF. Tussikgo. 425 



one flower. The cahjx is uniformly very densely and copiously 

 woolly rather than hairy. Florets of the disk tipped with dark 

 purple, or brown 3 those of the radius twice the length of the 

 calyx or seed-down, more lanceolate than in the former, and 

 more upright, their colour white, except the inside of their tu- 

 bular part, and the stigmas. Seef/s hairy. Down rough. 

 Linnaeus for a longtime confounded these two last species, so that 

 his accounts of them, his synonyms, and even his figure of the pre- 

 sent in Ft. Lapp., made in Holland from a dried specimen, alto- 

 gether require correction. Not having compared them in a living 

 state, I trust to Haller, Bertoloni, and other able botanists who 

 have, rather than to any theoretical opinion of my own. Nobody 

 who has seen them can fail to distinguish them at first sight, 

 whether their differences be permanently specific or not. Some 

 have very unadvisedly confounded £. alpinus, in a luxuriant state, 

 with our common E. acris. The /lowers of the latter, always 

 numerous, are not half so large, and the blue upright j^ore^s of 

 the radius are but the length of the seed-down. The near ap- 

 proach of these two, and of many foreign species, to each other, 

 though certainly distinct, may teach us caution with regard to 

 E. uniflonis. 



397. TUSSILAGO. Colt's-foot and Butter-bur. 



Linn. Ge)i. 423. Juss.lSl. FL Br.S7S. Toimi. t.276. Lam. 



t. 674. Gcertn. t. 170. 

 Petasites. Tourn.t,2bS. Gcertn. t.\66. 



Nat. Ord. see ?i. 396. 



Common Col, simple, cylindrical; scales from 15 to 20, li- 

 near, erect, close, parallel, equal. Cor. compound, va- 

 rious ; Jiorets in some all tubular, with 5, rarely but 4, 

 equal segments, furnished with stamens and pistils which 

 are more or less perfect, the latter chiefly fertile in the 

 florets of the circumference, which in some species are 

 lioulate and radiant, very narrow, without stamens. Fi- 

 lam. in the perfectly formed, seldom fertile, florets, awl- 

 shaped, very short. Anth. either united, or converging, 

 in the form of a tube. Germ, in all the florets obovate, 

 short, often imperfect. Stijle thread-shaped. Stigmas 2, 

 prominent ; linear when perfect and efficient ; thick and 

 short when abortive. Seed-vessel none, except the hardly 

 altered, finally reflexed, calyx. Seed oboyate-oblong, 

 compressed, rarely perfected. Doxsn sessile, (not, as 

 Linnseus says, stalked,) copious, simple, silvery, scarcely 

 roughish, permanent. Recept. naked. 



Herbaceous plants, with perennial, fleshy, widely creeping 

 roots, no stem. Leaves simple, variously heart-shaped, 



