CARDUACEAE 1485 
of scales or bristles in several series, or obsolete.—About 350 species, mostly 
natives of the Old World.—Sum.—S'TAR-THISTLES. 
eor i stem and branches winged. oo, 
ste oolly: spines of the involucre yellowish. 1. C. solstitialis. 
Em: pluie: of the involucre purplish. 2. C. melitensis. 
Corollas purple: em and branches wingle SS. 3. C. Calcitrapa. 
l. C. solstitialis L. Stem 3-6 dm. tall, woolly: blades of the stem-leaves 
elliptic. lanceolate or d entire or merely toothed: involueres ovoid or sub- 
globose, about 1.5 em. long; bracts various, 
the intermediate ones with long, sle pe er, 
ye loy Is nee yellow.— (BAR 
BY"S-THISTLE.)—Was te-places, fields, ud 
roadsides, various dc Fla. to " Calif., 
Ia., Ont., and Mass. Nat. of Eu. 
2. C. m Per: L. Stem 1 m. tall or less, 
huno par! Side 14 Vd ee leaf- 
of 
—— 
ee 
Lu. 
= 
- pu pef 
SS 
Pon 
L ne 
prickles: a yellow.—Vari prov- 
inces, Ga. to , N. Mex., Calif., Mo., and Mass. Nat. of Eu. 
3. C. Calcitrapa L. Stem 3-4 dm. tall: blades of the stem- Ed 1—2-pin- 
nudi corollas purple.—Waste- tae various provinces, Ala. to N. C. and 
Mass.; also on Pacific Coast. Nat. of Eu. 
Centaurea Cyanus L. An annual, native of Europe, with white- floccose foliage, 
narrow entire leaves, white, pink, blue, or purple heads, and spineless involueral 
braets, has eseaped from cultivation in the eastern United States. It is known 
as s CORN- -FLOWER, BLUEBOTTLE, BACHELOR’S-BUTTON, or RAGGED-ROBIN. 
NICUS L. Annual, caulescent, widely branched herbs. Leaves 
ores blades sinuate-pinnatifid and spiny-margined or merely spiny-pin- 
natifid, veiny. Heads erect, many-flowered, sessile. Involuere ov oid, leafy- 
involuerate: bracts narrow, rigid, some of them pectinate-spiny near the tip, 
appressed. Receptacle with ronal bristles. Flowers various, the marginal 
ones sterile, the central fruit-producing. Corollas elongate, with a slender tube 
nd a shorter cylindric- aod ED oat: 
lobes narrow, unequal. Anthers minutely 
tailed at the base, with er a appen- 
dages. Achene stout, oblique, many striate- 
ribbed, with a scalloped crown. Pappus 
ouble, the outer row of long slender-sub- 
ulate bristles, the inner of short-subulate 
bristles.—One species. 
1. C. benedictus L. Stem usually less than 
1 
late, the upper ones somewhat clasping: in- 
voluere 1.5-2 em. in diameter; larger bracts 
