552 COMPOSITAE. Vo. III. 
\h Hd WAN 
\W i iN Naa 10. Cirsium nebraskénse Britton. Nebraska 
eye Thistle. Fig. 4645. 
SO ; 
\\ WC \ 
Sey 
Carduus nebraskensis Britton, in Britt. & Brown, Ill. Fl. 
3: 487. 18098. 
Stem densely white-woolly, apparently over 1° high. 
Leaves linear-oblong to lanceolate, white-woolly be- 
neath, green and sparingly loosely woolly above, ir- 
regularly slightly toothed or entire, the upper 3'-6’ 
long, 4’-1' wide, the margins prickly; heads solitary, 
or few, short-peduncled, about 13’ high; outer bracts 
of the involucre lanceolate, prickle-tipped, the inner 
j narrower with a reflexed acute scarious appendage; 
pappus bristles of inner flowers plumose, of the outer 
barbellate. 
Western Nebraska and Wyoming. Summer. 
11. Cirsium odoratum (Muhl.) Britton. 
Pasture Thistle. Fragrant Thistle. 
Fig. 4646. 
Cnicus odoratus Muhl. Cat. 70. 1813. 
Carduus pumilus Nutt. Gen. 2: 130. 1818. 
Cnicus pumilus Torr. Compend. 282. 1826. 
Carduus odoratus Porter, Mem. Torr. Club 5: 345. 
1894. 
Biennial, more or less villous-pubescent; stem 
stout, simple or branched, leafy, 1°-3° high; roots 
thick, branched, solid; stem leaves green both sides, 
sessile and clasping, oblong or oblong-lanceolate in 
outline, acute, 3-7’ long, 1-2’ wide, pinnatifid into 
triangular, acute, dentate, prickly lobes. Basal 
leaves petioled; heads solitary, terminal, 2’-3’ 
broad, about 2° high, often involucrate by the 
upper leaves; outer bracts lanceolate or ovate- 
lanceolate, with a slight glutinous strip on the 
back, glabrous or sparingly tomentose, tipped with 
slender prickles, the inner narrow, long-acuminate ; 
flowers purple, rarely white, fragrant; tips of the 
pappus bristles usually spatulate. 
In fields, Maine to Pennsylvania, Delaware and 
West Virginia.. July—Sept. 
12. Cirsium Hillii (Canby) Fernald. 
Way Hill’s Thistle. ig. 3 
We WW, s Thistle Fig. 4647 
Kip Gi Cnicus Hillii Canby, Gard. & For. 4: 101. 1891. 
WW Carduus Hillii Porter, Mem. Torr. Club 5: 344. 18094. 
Cirsium Hillii Fernald, Rhodora 10: 95. 1908. : 
Perennial, low, villous-pubescent or somewhat 
woolly; stem leafy, simple or branched, 1°-2° 
high; root perpendicular, fusiform, slender and 
hollow above, enlarged below, 8-12’ long; leaves 
green both sides, mostly obtuse, lobed or pin- 
natifid, the lobes mostly broad and rounded, den- 
tate, spinulose or with some rather stout prickles, 
the upper oblong, sessile and clasping, the lower 
spatulate-oblong, narrowed at the base or the 
lowest ones petioled and 6’-8 long; heads 2’-3’ 
broad, about 2’ high; outer bracts of the invo- 
lucre ovate-lanceolate, tipped with short bristles, 
conspicuously glutinous on the back, the inner 
narrowly lanceolate, long-acuminate; flowers pur- 
ple; pappus bristles slender-pointed or some of 
them slightly spatulate. 
In fields, western Ontario to Minnesota, south to 
Pennsylvania, Illinois and Iowa. June-July. 
