462 SYNGENESI A [ Astkroide* 



§2. Amrlm,* Leaflets of the involucre ciliate, mogily squarrose, the outer 

 onee herbaceous. Akenes hairy, or sometimes smooth. Heads of flowers large. 



1. A. nudiflorus, JSTutt. Stem smooth, simple, corymbose at sum- 

 mit ; leaves sessile, ovate-lanceolate, subacuminate, sharply serrate, the 

 upper surface scabrous ; corymb simple, few-flowered ; peduncles 

 pubescent, naked, mostly 1 -flowered; involucre hemispherical, closely 

 imbricated, the leaflets oblong, ciliate. Becky JJot.p. 183. 



Naked-flowered Aster. 



Ste?n 2 to 3 feet high, slender, striate, smooth, simple, with a few short spread- 

 ing corymbose branches at summit. Leaves about 3 inches long, and an Inth 

 wide, ovatc-lanccolate, or lance-oblong, the upper ones not much smaller, acute 

 or subacuminate, serrate, entire and often cuneately tapering towards the base, 

 scabrous on the upper surface and margin, the apex and serratures mucronate, 

 the under surface pilose on the nerves and veins. Heads of flowers few, large ; 

 peduncles half an inch to 2 or 3 inches long, pubescont, often somewhat in threes 

 at the summit of the branches, the lateral ones longest; involucre smooth; the 

 leaflets linear-oblong, often slightly spatulate. rather acute, pubescent-ciliato on 

 the margin, the apex dec|>er green; rays palish violet-purple, numerous, lance, 

 linear, longer than the involucre ; disk yellowish brown. Akenes smooth ; pappus 

 reddish tawny. Receptacle alveolate or pitted, the pits with chatty dentate mar. 



gins. 



Hub. Low grounds ; in the Great Valley : rare. Fl August. Fr. September. 



Obs. This ts rather a pretty species, and quite rare, here ;— having only been 

 found, as yet, near R. M. Thomas's Mill Dam, in the Great Valley,— where it 

 was collected by D. Townsbnd, Esq. in 1830. 



2. A. Nov* Angltje, L. Stem hirsute, corymbose-paniculate at 

 summit; leaves linear-lanceolate, entire, amplcxicaul, auriculate at base, 

 scabrous-pubescent ; leaflets of the involucre lance-linear, loose, spread- 

 ing, foliaceous, hairy, longer than the disk. JJeck y Bot % p. 182. 



Nhw Exoland Aster. 



Stem 3 to 6 or 6 feet high, rather stout, scabrous and hairy, mostly dark purple, 

 often numerous from the same root. Leaves 1 to 2 or 3 inches long, and 1 fourth to 

 half an inch wide at base, tapering gradually to the apex, rcliculately veined, 

 pubescent, numerous on the stem and branches, the upper ones mostly purplish. 

 Heads of flowers numerous, rather large and crowded, in terminal corymbose 

 panicles; peduncles half an inch to 3 or 4 inches long, pubescent and leafy ; invo- 

 lucre scabrous-pubescent, the leaflets long, narrow, lance-linear, acute, 3-nerved, 

 herbaceous, loose and spreading, generally dark purple ; rays bright deep purple, 

 with a tinge of violet ; disk yellow. Akenes mostly very hirsute. Receptacle al- 

 veolate, the alveoli with dentate margins. 

 Ilab. Low grounds ; Great valley : rare. FL September. Fr. October. 



Obs. This is a very ornamental species, and is often introduced into flower 

 gardens. It was first collected in this County by Mr. Joseph Jacobs— and subse- 

 iprently by Mr. Joshua Hoopbs ; but it is by no means common. The leafy pan- 

 icles are slightly viscid, and emit a pleasant resinous odor. 



* I have mainly adopted Nees von Esenbeck's arrangement of our Asters;— 

 although I think, with Prof. Hooker, that in the creation of new Genera from them 

 the learned Author has refined his genoric characters almost CM much, for prac- 

 tical utility. We hate no species here, belonging to his first section. 



