118 
POLYGAMIA, SUPERFLUA. 
ledifolius. 
tenuifolius. 
Canadensis. 
About one or two feet high. Very slender and weak. Flow- 
ers white, rather small. In swampy thickets, not uncommon. 
Perennial. August. 
£7. A. leaves linear-lanceolate, attenuated at the 
base, nerveless, scabrous, margin revolute ; 
branches corymbose; branchlets filiform, one- 
flowered, somewhat naked; calices loose, im- 
bricated, twice as short as the disk ; folioles very 
acute ; ray sub-£0-flowered . — -Purslu 
A. salsuginosus, Bart. Prod. FI. Ph. 
Fifteen inches high. In the swamps of Jersey, near Wood- 
bury; rare. Perennial. July. 
£8. A. leaves linear-lanceolate, attenuated at each 
end, hispid on the margin; stem glabrous, 
branched, erect ; branchlets one-flowered ; cali- 
ces imbricated, scales oblong-acute, loose.--^ 
Willd. 
A. Philadelphicus, Bart. Prod. FI. Ph. 
From one to two feet high. In neglected fields. August. Re- 
sembles No. 4 and No. 25, but very distinct. It appears to me 
to be a variety of A. Tradescanti. But in reality this polymor- 
phous genus is so deceptive, that it is not improbable 4, 25 and 
this No. will turn out to be little else than anomalous varie- 
ties of one species. The same observation applies to many 
other species, which I have enumerated above, though I give 
them the places usually assigned to them in the books. Close 
attention to the cultivation of the 79 species of this elegant 
genus, and their enumerated varieties, would in all proba- 
bility result in a reduction of the species to one half that num- 
ber. 
318. SOLIDAGO. Gen. pi. 1292. (^Corymbiferae.') 
Oalix imbricated, scales closed. Radical 
florets about 5, yellow. Receptacle naked, 
punctate. Pappus simple, pilose. 
1. S. stem villous j leaves lanceolate, serrated, three- 
nerved, rough ; racemes paniculated, leaning one 
way, recurved ; ligulse short. — Willd, 
Icon. Flak. aim. t. 263. f, 1. 
