COMPOSITE FAMILY. ; 197 
s. The flowers of this species are quite fragrant, and the heads 
somewhat showy or ag ig , being larger than those of any other 
on thistle. It does t disseminate r rapidly, and is therefore easily 
in subjection by igen attention. 
4, e horrid’ulum, Mz. Leaves semi-amplexicaul, pinnatifid, lanugi- 
nous beneath—the short ents toothed or incised, strong gly Sseiegh : 
involucre ovoid, large, with a verte of Beptiiie tely spinose bracts at 
base ; scales lo oosely im rei ted, linear-lanceolate, tapering to a patie 
point, but scarcely spin 
SoMEWHAT RUGGED Cras ‘Yellow sabe 
as biennial? (perennial, DC.). Stem 18 inches to 2-3 feet high, rather stout, simple 
parin: ne bombed, eos oid-lanuginous when oda Z, finally’ smoothish. Leaves 
re 12 prin long, hairy’on n the — a lanuginous beneath ,—the segments pointed 
with short rigid spin Heads t nal, few, (often but one), nearly as large as in the 
preceding species, Goridant ad pe ae by a whorl of numerous (10-20 or 30) linear- 
lanceolate br , about as Jong as the involucre,—the b innatifid or sinuate- 
dentate, pectin tely Spinose, with the spines h or fascic 
inch ng ink: and a half long, pale yellow (sometimes ereki? or becoming purple in 
ing 
Pastures and = & reget; sea coast, from Massachusetts to Louisiana : introduced. 
Fl. July. Fr. Aug 
Obs. A ragged’ and repulsive plant, which is very common on the sea- 
in and which it is very desirable should remain a stranger to our 
*** Scales of - nie ssheoeo- involucre barely ont ga ‘ili 
smooth ; heads imperfectly diac 
5. C. arven Se Rhizoma creeping ; — sakes oe ender, striate- 
1 eee Sop branched at summit ; leaves sessile, ere 
uate-pinnatifid and dentate, undulate, cifteapthons heads numerous, 
eat: ; Involucre oblong-ovoid ; ; scales appressed, lance-ovate, mucro- 
nate,—a few of the outer ones cuspida ciactiaick 
Freip Crrstum. Canada Thistle. Cursed Thistle. 
Fr. Chardon aux Anes. Germ. Die Acker Kratzdistel. 
ne es nnial,—creeping conker rig inches below the surface of the e ground, 
and giving on peso erect biennial branches. Stem 18 inches to 3 feet high, slender 
and smoothish, branches slend cot lanuginous. Leaves 4-8 or 10 inches long, 
Sessile and tly decurrent, smoothish on the upper surface, someti 
lanuginous beneath,—the curled or wavy. Heads half an inc! 
of an inch in diameter, t su culate ; smoothish, minutely ciliate. 
with whitis anthers, perfect or the heads dicecious by abor- 
-purple, al 
tion. _Akenes 4cor : finally longer than the florets. 
Pics lige A and mae and Middle aie renal teesrtheg Native of Europe. 
u 
Obs. This is, peta, the most execrable weed that has ¥a invaded 
the farms of o country. The rhizoma or subterranean stem (which is 
eI en and she us 
Satay wamacs rtoweehie ohas ated pe siprgreetra ar 
