506 
SYNGENESIA JE&UALIS. 
lanceolatus. 
altissimus. 
arverisis. 
muticus. 
virginianus . 
607. CNICUS. Gen.pl. 12 55. 
1. C. foliis decurrentibus hispidis pinnatifidis, laciniis bilobis 
divaricatis spinosis, calycibus ovatis arachnoideo-pube- 
scentibus, squamis lanceolatis spinosis patentibus.. 
Wiltd.sp pl. 3, p. 1666. 
Carduus lanceolatus. Sp. pl. 1 14 9. 
On road sides j 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. Willd. sp. pl. 3. p. 1671. 
Carduus altissimus. Sp.pl. 1154. 
Carduus virginianus. IValt.Jl . car. 195. 
Cirsium repandum. Mich.fi. amer. 2. p. 89. 
Cirsium altissimum. Gron.fi. vir g. 11 7. 
In old fields : Virginia and Cardina. 7/ . July — Sept. 
v. v. Flowers large, purple. 
3. C. foliis sessilibus pinnatifidis glabriusculis ciliatis spino- 
sis, caule paniculato, calycibus ovatis mucronatis, 
squamis lato-lanceolatis adpressis margine lanatis. 
Carduus arvensis. Smith fi. brit. 2. p. 850. 
Serratula arvensis. Willd. sp. pl. 3. p. 16413. 
Icon. FI. dan. 644. Engl. bot.Q75. Mart.fi. rust. 132. 
In fields and on road sides : Canada and New England. 
7/. 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 abutis, ramis in summi- 
tate pluribus nudiusculis unifloris, calyce globoso, 
squamis muticis. 
Cirsium muticum. Mich.fi. amer. 2. p. 8 9. 
Carduus carolinianus. lVdlt.fi. car. 195. 
In the mountains of Virginia and Cardina. $ . July — 
Sept. v. v. Flowers middle-sized, purple. 
5. C. simpliciusculus j foliis sessilibus lanceolatis subtus 
cano-tomentosis remote dentatis, dentibus spinosis, 
floribus solitariis, calyce globoso, squamis mucronatis. 
Carduus virginianus. Willd. sp.pl. 3. p. 1 659. 
Cirsium virginianum. Mich.fi. amer. 2. p. 90. 
Icon. Jacq. obs. bot. 4. t. 99. 
