CARDUACEAE 1483 
9. C. Nuttallii (DC.) A. Gray. Stem 9-40 dm. tall, early glabrate: blades of 
the basal and the c cauline nee n ie elliptic- -spatulate, 2-pinnatifid: 
outer bracts of lg nvo ped. short-tipped, inner bracts abruptly short- 
tipped, 15-20 m iene orollas lilac to de) VA 20-25 mm. long.—Dry 
soil, Coastal Plain, Fla. to "Miss. and S. C.— —Spr.-fall or all year S. 
10. hi altissimum (L.) Spr eng. Stem 9-30 dm. tall, downy: blades of the 
basal or lower cauline vais Ain or broadest above or below the d 
sues white-tomentose ben : dod braets = the involucre with tips abou 
¥4 as long as the body, the inner SM 8—30 mm. long: corollas purple to Ee 
37—40 mm. long.— (ROADSIDE-THIS B —Thickets and fields, various provinces, 
Fla. to Tex., Minn, and Mass.—Sum.-fall. 
e e peer iu Spreng. Similar to C. altissimum in habit, but seldom 
20 dm l: leaf- S P AE to ov ate- lanceolate, 
anes white. eee ben r bracts the E with tips a about 
8s long as the body, the inner adds 25-28 mm. long: corollas, lilac to purple, 
28-30 m ng.—( FIELD- a ee es and joa dsides: various provinces, 
rarely Coastal ‘Plain, Ga. to Miss., Mo., Ont., and N. B.—Sum.-fal 
12. C. lanceolatum (L.) pw sd A dm. tall, a pas 
crowded; blades lanceolate, 1 or 2 pinnatifid, grayish- woolly beneath: 
bracts of the involucre d narrow med into slender tips, the inner ee 
very dead Ae eed and attenuate: corollas, brilliant violet, 32-35 mm. long. 
B 
— (COMMON-THISTLE. L-THISTLE. )—Fields, pe and ro adsides, vari- 
ous provinces, "Ga. to Nebr., Calif., , Minn., and Newf.; mostly a weed. 
Nat. of Eu.—Sum.-fall. 
13. C. vittatum Small. Stem 2-7 dm. tall, thinly pubescent: leaf-margins 
undulate or d with mostly ascen ding s spines: inner braets of the in- 
voluere 30—35 1 m. long: eorollas yellow or eream, about 30 mm. long: anthers 
much longer than the filaments.—Everglades and low pinelands, Everglade 
Keys, Fla.—Spr.-sum. 
14. C. Smalli Britton. Stem 4-9 dm. tall, ene dps leaf-segments 
r bra 25— 
with the terminal spines directed forward: of the involuere 
30 mm uud a yellow or m m, 30- dn dbi pr about as long 
as the filam [C. pinetor m Small not Greenm ra MEE and sand- 
dunes, Coastal Plain; Fla. to S. ‘C— (W. I.)—Wint.-late spr. 
9. C. horridulum Michx. Stem 3—40 dm. tall, woolly: leaf- CUN with 
eae spines: inner bracts of the involucre 40-45 mm. long: corollas 40-43 
mm. long, edit (or purple in C. horridulum Add anthers oa cece 
than the filaments. [Carduus spinosissimus Walt.]—(YELLOW-THISTLE. )—Low 
grounds, eee and pastures, Coastal Plain ond adj. provinces, Fla. to ui 
and Me.—Spr.-sum.—Often a 
. ONOPORDUM [Vaill.] L. Annual or biennial, caulescent, coarse 
hei, the stems and branehes winged. Leaves alternate: blades sinuate or 
ge 
priekle-armed, decurrent. Heads erect, many-flowered. Inv olucre 
ovoid, globular, or depressed: bracts numerous, narrow, spine-tipped. Recepta- 
honeycombed. Flowers numerous, all alike, perfect, tubular. DEN S 
o with a slender tube and a shorter campanulate throat: lobes linear or 
