AND QENERA OF PLANTS. 295 



Obs. — About a foot high; stem below minutely pubescent. Leaves about three inches long, 

 less than an inch wide, scabrous towards the margin, elsewhere nearly smooth and rather shining. 

 The corymb composed of fastigiate, mostly one-flowered, (sometimes two or three,) leafy branch- 

 lets; occasionally, from luxuriance, the branchlets are more compound, producing a rather irregiilar 

 corymb; the points of the leaves long, and very acute; sepals about two series, nearly equal, her- 

 baceous and viscid. Eays styliferous, rather numerous and narrow, pale blue. Pappus whitish, 

 moderate, scarcely scabrous. Achenium almost perfectly smooth, compressed, ten-striate. This 

 species has much the habit of a Galatella. 



Aster * ciliatus, branches one-flowered, fastigiate ; leaves entire, linear-oblong, 

 acute, above lanceolate, very scabrous and ciliated on the margin, above nearly 

 smooth, beneath minutely hairy and hirsute; involucrum foliaceous; leaflets 

 lanceolate, very acute, margined M^ith long cilise; achenium smooth. 



Hab. In Louisiana, v. s., in Mr. Durand's herbarium, of Philadelphia. Closely allied to A. 

 montanus, with the same achenium, but the upper leaves lanceolate, and the pubescence at vari- 

 ance with the section to which it belongs. 



TRIPOLIUM. (Nees.) 



With the flower of Aster, but the involucrum erect, of two unequal series of 

 oblong or ovate, obtuse, short sepals. Achenium compressed, margined, 

 nearly smooth, without strise, with a minute basal circle of bristles. Flow- 

 ers corymbose. Obs. — To this genus, properly restricted, nothing yet be- 

 longs but the T. vulgare. [Aster Tripolium, Lin.) 



Subgenus (or, perhaps, more properly a section of Aster.) *Astropolium. 



With the flower of Aster. Sepals of the involucrum mostly subulate, or 

 acute, imbricated loosely in several unequal series, more or less herbaceous. 

 Pappus slender, scarcely scabrous. Achenium nearly smooth, compressed, 

 four or five striate. — Smooth, divaricately branching herbs, mostly with entire, 

 narrow, or subulate, somewhat fleshy leaves. Growing commonly in saline 

 soils or alluvial grounds. 



Tripolium Jlexuosum, sepals lanceolate, subulate, very acute, scariose, erect ; 

 stem low and flexuous, stem leaves subulate. 

 Hab. Along the sea coast. New Jersey, &c. 



