294 DESCRIPTIONS OF NEW SPECIES 



Hab. In Georgia, (Dr. Baldwin and Leconte,) near Chapel-Hill, North Carolina, (Schweinitz.) 

 — A remarkably distinct species, diffusely subdecunabent, with slender wiry stems and branchlets, 

 terminating in one or a few (three to five) large capituli, very similar to those of A. surculosus, 

 near which it ought to range. Exceedingly rough, (particularly when dry,) with minute, tubercu- 

 late, hooked bristles. Rays large, and of a purplish-blue. The inner leaves of the involucrum 

 somewhat viscid at the tips. 



Aster * amethystinus, pubescent; stem usually erect, villous, racemosely pani- 

 culate, many-flowered, branchlets subfastigiate ; leaves entire, lanceolate-linear, 

 acute, auricularly dilated and amplexicaule at base; involucrum loose, or squar- 

 rose, the sepals acute or acuminate; achenium villous; rays numerous, azure. 



Hab. In Massachusetts, near Cambridge and Salem ; rare. A well marked and ornamental spe- 

 cies, somewhat allied to A. graveolens, intimately to A. Novse-Anglix, but from which it is en- 

 tirely distinct, the flowers not half the size, pale blue, very numerous, and disposed in a panicle, &c. 



Aster graveolens, suffruticose, divaricately branched, minutely and viscidly 

 pubescent; leaves oblong-lanceolate, amplexicaule, entire, very acute, radical 

 ones narrowed at the base; branches usually one-flowered, fastigiate; involu- 

 crum squarrose, loose, leafy; sepals linear-lanceolate, acuminate; achenium 

 smooth, ten-ribbed. 



Hab. On shelving rocks, near the banks of the Arkansa; also on the banks of Kentucky River, 

 near Lexington, (Dr. Short.) On comparing the plants anew, I find the present and following 

 from Missouri, distinct species. 



Aster ohlongifolius, herbaceous, stem, and linear-oblong, obtuse leaves mi- 

 nutely scabrous, amplexicaule; stem divaricate, flowers fastigiate; involucrum 

 foliaceous, loose; sepals linear-oblong, acute. 



Hab. Banks of the Missouri, in arid, argillaceous and denudated places. Not viscid or strong- 

 scented, as in the preceding, to which, at the same time, it is much allied. 



Aster *Sayianus, stem simple, terminating in a leafy corymb, above, and 

 branchlets with the involucrum glandularly pubescent ; leaves crowded, lanceo- 

 late, acuminate, distantly serrulate, amplexicaule, and scabrous on the margin, 

 those of the branchlets ovate, entire; sepals of the involucrum spreading, nearly 

 equal, acuminate; capitulum hemispherical, the rays blue; achenium smooth, 

 ten-striate. 



Hab. In the forests of the Rocky Mountains and the Oregon plains. Nearly allied to A. mo- 

 destus, and proximately to A. Novss-Angliae. 



