ADENOSTYLES. 



An herbaceous perennial. Leaves stalked, cordate, toothed, smooth 

 on both sides ; petioles half amplexicaul, but not furnished with ap- 

 pendages at the base. Corymbs fastigiate. Heads 3-6-flowered. — 

 The leaves have been recommended in coughs. 



TUSSILAGO. 



Head many-flowered, heterogamous ; florets of the ray ? , in 

 many rows, very narrowly ligulate ; of the disk $ , few in num- 

 ber, tubular, with a campanulate 5-toothed limb. Receptacle 

 naked. Involucral scales in about 1 row, oblong, obtuse. An- 

 thers scarcely tailed. Styles of the disk inclosed, abortive ; of 

 the ray bifid, with taper arms. Aclnenium of the ray oblong- 

 cylindrical, smooth, of the disk abortive. Pappus of the ray in 

 many rows, of the disk in 1 row, consisting of very fine setae. 

 DC. 



913. T. Farfara Linn, sp.pl 1214. Eng. Bot. t. 429. Smith 

 Eng. El. iii. 425. DC. prodr. v. 208. — Various parts of Eu- 

 rope, the Crimea, Persia, Siberia, the East Indies, from the sea 

 shore to elevations of nearly 8000 feet. (Coltsfoot.) 



Rhizoma mucilaginous, bitterish, creeping horizontally, with many 

 fibres. Flower-heads coming before the leaves; drooping in the bud, bright 

 yellow, about an inch broad ; the rays spreading, copious, very narrow. 

 Each flower-head on a simple, round, woolly, radical stalk, scaly with 

 numerous, reddish, smooth, scattered bracteas, crowded under the 

 head, like an exterior involucre. Leaves erect, on furrowed, channelled 

 footstalks, heart-shaped, slightly lobed, copiously and sharply toothed ; 

 very smooth, of a slightly glaucous green above ; pure white and 

 densely cottony, with prominent veins, beneath ; when young they are 

 revolute, and thickly enveloped in cottony down. — The leaves either 

 smoked like Tobacco, or taken in infusion, have been employed against 

 dyspncea. It is a demulcent bitter and acts by soothing irritation of the 

 air passages. Mr. Pereira calls it a very slight tonic. 



ERIGERON. 



Head many-flowered, radiant ; ligulae ? , in several rows, 

 linear, as long, or longer than the disk; florets of the disk tu- 

 bular, regular, either all cf; or the outer ? and the central $, 

 or perhaps $ by abortion. Receptacle naked, dotted, with the 

 sockets of the florets fringed. Achaenium compressed, not naked. 

 Pappus hairy, rough, in 1 row, (or in 2 rows ? the innermost 

 being very short.) DC. 



914. E. philadelphicum Linn.sp.pl. 1211. Pursh. ii. 533. 

 Elliott sketch ii. 396. DC. prodr. v. 285. — E. amplexicaule 

 Poir. suppl. v. 464 — Common in North America, in pastures 

 and fields from Canada to Carolina. 



Root perennial. Stem 1-2 feet high, slightly furrowed, downy with 



spreading hairs. Leaves of the root cuneate-obovate, sometimes deeply 



sinuate, the upper becoming gradually entire, oblong-lanceolate, and 



amplexicaul. Involucral leaves subulate. Heads in a loose corymb. 



453 G G 3 



