506 
lanceolatus. 
aliissimiis. 
atvensis. 
muticus. 
virginianus , 
SYNGENESIA ^aUALIS. 
6o;. CNICUS. Gen.pl 1255. 
1. C. foliis decurrentibus liispidis pirmatifidis, laciniis bilobis 
divaricatis spinosis, calycibus ovatis arachnoideo-pube- 
scentibiis, squamis lanceolatis spinosis patentibus. 
WiUd.sp pi. 3,p. l666. 
Carduus lanceolatus. Sp.pl. l\Ag. 
On road sides 5 common every where. June — ^ 
Sept. V. V. Flowers large, purple. 
2. C. foliis sessilibus oblongo-lanceolatis scabris subtus to- 
mentosis dentatis ciliatis, radicalibus pinnatifidis, caly- 
cibus bracteatis ovatis, squamis ovato-lanceolatis spi- 
nosis adpressis. IVilld. sp. pi. 3. p. 1671. 
Carduus altissimus. Sp. pi. 1154. 
Carduus virginianus. Walt. Ji. car. 195. 
Cirsium repandum. Mich.Ji. amer. 2. p. 89. 
Cirsium altissimum. Gron.Ji. virg. II7. 
In old fields ; Virginia and Carolina. 11 . July — Sept. 
V. V. Flowers large, purple. 
3. C. foliis sessilibus pinnatifidis glabriusculis ciliatis spino- 
sis, caule paniculate, calycibus ovatis mucronatis, 
squamis lato-lanceolatis adpressis margine lanatis, 
Carduus arvensis. Smith Ji. Irit. 2. p. 850. 
Serratula arvensis. Willd. sp. pi. 3. p. 1646. 
Icon. FI. dan. 644. Engl, lot.gyd. Mart.Jl, rust. 132. 
In fields and on road sides : Canada and New England. 
%, July — Sept. V. V, Flowers small, purple. It 
is one of the most troublesome weeds, and when once 
introduced on a plantation it is almost impossible to 
get rid of it. 
4. C. foliis omnibus pinnatifidis subtus lanuginosis : laci- 
niis spinulosis sublanceolatis acutis, ramis in summi- 
tate pluribus nudiusculis unifloris, calyce globoso, 
squamis muticis. 
Cirsium muticum. Mich.Jl. amer. 2. p. 89, 
Carduus carolinianus. Walt.jl. car. I95. 
In the mountains of Virginia and Carolina. $ . July— 
Sept. V. V. Flowers middle-sized, purple. 
5. C. simpliciusculus ; foliis sessilibus lanceolate subtus 
cano-tomentosis remote dentatis, dentibus spinosis, 
floribus solitariis, calyce globoso, squamis mucronatis. 
Carduus virginianus. Willd. sp.pl. 3. p. I659. 
Cirsium virginianum. Mich.Jl. amer. 2. p. 90. 
Icon. Jacq. ohs. lot. 4. t.gg. 
