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. Acluenium 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. arfara Linn. sp. pi. 1214, Eng. Bot. t. 429. Smith 

 Eng. Fl. 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 

 dyspnoea. 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 "; 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. pi. 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 



