SYNGENESIA— POLYG.-SUPERF. Tussilago. 425 



on radical footstalks, toothed or entire, most downy be- 

 neath. Fl. on simple or panicled, bracteated, radical 

 stalks, yellow, white or purplish. Marginal ^ore^s either 

 radiant, occasionally naked, or deprived of their corolla ; 

 or tubular, with the same part only 4-cleft5 or otherwise 

 imperfect. The plants always increase so much by root, 

 that seeds are, in the Butter-bur tribe especially, very 

 seldom ripened ; hence great difficulty exists in ascer- 

 taining the true nature, or natural relative perfection, of 

 the organs of the^otm^r. 



1. T. Farfara. Colt's-foot. 



Stalks single-flowered, clothed with scaly bracteas. Flowers 

 radiant. Leaves heart-shaped, angular and toothed. 



T. Farfara. Linn. Sp. PL 1214. fVitld. v. 3. 196". Fl. Br. 878. 



Engl. Bot. V. 6. t. 429. Curt. Loncl.fasc. 2. t. 60. M'oodv. t. 13. 



Hook. Scot. 242. Bull. Fr. t. 329. Drei-es Bilderh. t. 49. Fl. 



Dan. t. 595. Ehrh. PL Off. 187. Lob. Ic. 589./. 

 Tussilago. Rail Syn. 173. Ger. Em. 811./ Malth. Falgr. v. 2. 



198./. Camer. Epit. 590, 59\.f. Fuclis. Hist. 140./. Ic. 76. f. 



Bauh. Hist.v. 3. p. 2. 563./. Moris. t'.3. 130. sect. 7. t. 12. f. 1. 



Dalech.Hist. !05l./. 

 Petasites n. 1 43. Hall. Hist. v. 1 . 62. 



Ungula caballina. Trag. Hist.4\S.f. Brunf. Herb. v. 1.42./.41. 

 Bechium. Tillands /c.24./. Cord. Hist 93. 2./. 

 Colt's-foot. Petiv. H. Brit. t. 17. f. 7, 8. 



In moist shady situations, on a chalky or marly soil, common. 



Perennial. March, April. 



Root mucilaginous, bitterish, creeping horizontally, with many 

 fibres. Fl. coming before the leaves, drooping in the bud, bright 

 yellow, about an inch broad ; their rays spreading, copious, 

 very narrow ; each flower on a simple, round, woolly, radical 

 stalk, scaly with numerous, reddish, smooth, scattered bracteas, 

 crowded under the flower, like an exterior calyx. Leaves erect, 

 on furrowed channelled footstalks, heart-shp.ped, slightly lobed, 

 copiously and sharply toothed j very smooth, of a slightly glau- 

 cous green, above ; pure white and densely cottony, with pro- 

 minent veins, beneath ; when young they are revolute, and 

 thickly enveloped in cottony down. 



The cotton, impregnated with salt-petre, makes excellent tinder. 

 The leaves, either smoked like tobacco, or taken in infusion, are 

 reputed good for coughs, whence the generic name. 



2. T. Petasites. Butter-bur. 



Panicle dense, ovate-oblong. Flowei's flosculous. Leaves 

 heart-shaped, unequally toothed, three-ribbed at the base. 



