COMPOSITE FAMILY. 199. 
of radical — rae deprive the rhizoma of all connection or communi- 
cation with the osphere 
+ following ae of this bere 7 weed, from Curtis’ Flora Lon- 
dines, hap not be uninterestin ng to the American farmer 
m agrorum apud nos primarium a [it wi ie greatest pest of 
our fils LInN£US oheerranae in his Flora The same may be 
id with us: and we have bestowed on rx an ‘the eg name of 
cursed, with a ied ks pe 85, the attention of the Agriculturists of our 
country to its n and pernicious effects 
“ Repeated chservaton has convinced us that many husbandmen are 
ignorant of its my,—and while oo remain so, they will not be 
pred to get z of. oti e of the greatest pests which can affect their corn- 
a 
C. muti Mz., with the heads C. 
mum, Spreng., with the stem-leaves not pinnatifid) : but, as they do not 
incline much to infest the open grounds or farm-land, I have not judged 
it necessary to kotice them more partiouladly here 
26, ONES RO. Vail. Corton TuistLe. 
Heads and flowers nearly as in Cirsium. Scales of the Pe doit ip coria- 
honey-combed. Acheni gled, wrin 
tles, esrreg: not plumose, united at the base into a horny ri Coa: 
erbs ; ; the stem winged with the decurrent base of the peeity lobed 
Inere linear a’ 
Cotton Thistle. 
1. O. Acan’thium, L. Stem and leaves cotton-woolly ; scales of the invo- : 
awl-shaped. 
Annual. Stem 2-4 feet high, broadly winged by the decurrent elamat 
Leaves ovate-oblong, Posigs hae apr aey on both sides but most 80 oie : 
‘ rge purple, solitary at the end of th ong 
rous lanceolate very pungent scales, green with oft tips, the upper aoe pete erect, 
the middle ones spreading, the lowermost ig ail connected by a cottony web. 
EL: scarcely half the se i ts, jointed, rough dow ware ——F 
aturalized from Europe. alain pas 
a. 
appearance of its stem and leaves Very common ie ae i . 
in waste rp in "New England. ‘This Se obo tn re Sete he 
