CARDUACEAE 1451 
ud orange, 5-lobed: barbs of the achene-margins 
irected both i involucre Short. 4. B. connata. 
iioii. ES divided : pappu ns 2. 
AW long, usually Perret barbed : achene-body 5—11 mm. 
DUE involucral bracts 10-16, ciliate, the inner con- ; 
stricted at the tip: disk- corollas pale b. B. vulgata. 
Outer bracts 6-8, nearly ae ous, the inner not con- 
stricted: disk-corollas oran 6. B. frondosa. 
des short, erect-barbed: B hene. body 4-5.5 mm. long: 
leaf- blades long-acumin T. B. discoidea. 
III NUAE 
Outer involueral bracts exceeding the disk, foliaceous: ray- 
flowers with ligules twice the length of di sk or less: achene 
oo at the summit. 8. B. cernua. 
Outer bracts rarely a ae the disk : ray-flowers with ligules 
-4 times the length of disk: achene not dilated above. 
Blades of the upper cauline leaves elliptic-lanceolate to 
lanceolate, acuminate, mostly sharply serr 9. B. laevis. 
Blades of the upper cauline leaves spatulate, obovate, oval 
or elliptic, obtuse, abruptly pointed or a acutish, nearly en- 
tire, shallowly serrate, or crenate-serrate. 10. B. Nashii. 
IV. AUREAE 
Achene 6—8 mm. long, ciliate, 
In fruit obovate. 
Inv olucre nearly glabrous: pappus-awns slender or 
wanting. 11. B.aristosa. 
Involucre hispid: achene bidentulate. 12. B. involucrata. 
- In fruit narrowly cuneate, 2—2.5 mm. wide, short-awned. 13. B. coronata. 
Achene 2—4 mm. long, not ciliate, the awns very short. 14. B. mitis. 
B. bipinnata L. Stem 3-17 dm. ll glabrous or nearly so, 4-angled, 
nee ched and rather pues primary ers -segments thin, deltoid, the ultimate 
one lanceolate, inc ised d: than in- 
e 
places, various provinces, Fla. to  Ariz, 
Nebr., and R. I—(W. I. Mew. C. A., 
S Pepe 
B. osa L. Stem F dm. tall, 
bd 4-10 dm. hi igh, n arly o - qui uite 
glabrous: leaf-segments cu Or ME o 2-8 cm. long, ee er enate- 
serrate: outer bracts of the involucre about 8, linear- -elliptie, Hn shorter 
yp the inner: rays white, the ligules 1-2 cm . lon ng, broadly cuneate, 2—3-lobed, 
iiss awnless, few- barbed toward summit: disk- a 5: toothed : Pee 
athe erted: achene spindle-shaped, very unequal, the inner much longer 
than the “involuere awns 2-4, short, yellow, retrorsely barbe d. [B. leucantha 
L. ]— (SHEPHEF S-NEEDLE. — Sandy soil, cult. grounds, roadsides, and waste- 
aie Coastal Plain, Fla. and cub in S Ga. and Ala.—(W. I., Mez., C. 
A.,O. W.)—Al y 
E anes es Gray) Wiegand. Stem 3-8 dm. tall, pale RT 
t, glabro he branches short, stout: leaves undivided, 8 c : blades 
eee S regularly serrate, acute, each attenu ate are a margined 
petiole, or the upper sessile: heads large: peduncles short and stout: outer 
