Carthamus lanatus

Linnaeus

Sp. Pl. 2: 830. 1753.

Common names: Woolly distaff thistle
WeedyIntroducedIllustrated
Treatment appears in FNA Volume 19. Treatment on page 180. Mentioned on page 179.

Plants 40–180 cm, herbage ± densely glandular, loosely cobwebby to ± woolly. Stems rigidly erect, openly branched distally, stramineous. Leaves basal and cauline; basal often absent at anthesis, petioles winged, blades 10–15 cm, margins pinnately 1–2-divided into linear or lanceolate spine-tipped lobes; cauline spreading or recurved, lanceolate to ovate, rigid, clasping, 3–7-veined from base, margins with narrow spine-tipped lobes, spinose-acuminate. Involucres ovoid, body 25–35 mm, usually ± tomentose. Outer phyllaries ascending or ± spreading, 35–50 mm, usually not more than 1.5 times as long as inner, terminal appendages spreading to ascending, linear-lanceolate, spiny lobed, prominently spine-tipped. Corollas yellow, sometimes red or black-veined, 25–35 mm, throats gradually expanded; anthers yellow; pollen yellow. Cypselae brown, 4–6 mm, the outer roughened; pappus-scales 1–13 mm. 2n = 44.


Phenology: Flowering Apr–Sep(–Nov).
Habitat: Roadsides, grain fields, pastures
Elevation: 0–1100 m

Distribution

V19-202-distribution-map.gif

Introduced; Ariz., Calif., Mass., N.J., Okla., Oreg., Tex., Europe

Discussion

Native to the Mediterranean region, Carthamus lanatus is a viciously spiny noxious weed, sometimes forming nearly impenetrable stands. In rangelands it is known to injure the eyes and mouths of livestock, and it tends to spread when more palatable plants are consumed. Because of the close relationship between the cultivated safflower (Carthamus tinctorius) and its weedy relatives, biocontrol has not been an option for controlling weedy species such as C. lanatus.

Selected References

None.

Lower Taxa

None.

"fine" is not a number.

... more about "Carthamus lanatus"
short-tailed +
scarious +
oblong +, lobed +  and spiny-dentate +
indeterminate +  and determinate +
David J. Keil +
Linnaeus +
decurrent +
Asteraceae tribe Cynareae +
compound +  and simple +
dentate +  and pinnately lobed +
10 cm100 mm <br />0.1 m <br /> (15 cm150 mm <br />0.15 m <br />) +
10-nerved or 20-nerved +  and rugose +
2.5 cm25 mm <br />0.025 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
lanceolate +  and ovate +
Woolly distaff thistle +
red +  and yellow +
2.5 cm25 mm <br />0.025 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
4-angled +, oblong +  and obpyramidal +
fertile +  and bisexual +
Ariz. +, Calif. +, Mass. +, N.J. +, Okla. +, Oreg. +, Tex. +  and Europe +
0–1100 m +
glabrous +, tomentose +  and more or less +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Roadsides, grain fields, pastures +
in few-headed cymiform arrays +  and singly +
indeterminate +
loosely cobwebby +  and more or less woolly +
each +  and sessile +
constricted +
sessile +  and petiolate +
cauline +  and basal +
lanceolate +  and linear +
entire +  and dentate +
spinose-acuminate +  and 1-2-divided +
1.5+ times as long as inner phyllaries +
spreading +  and ascending +
3.5 cm35 mm <br />0.035 m <br /> (5 cm50 mm <br />0.05 m <br />) +
2-carpellate +
0.1 cm1 mm <br />0.001 m <br /> (1.3 cm13 mm <br />0.013 m <br />) +
persistent +
Flowering Apr–Sep(–Nov). +
papillate +  and smooth +
distinct +  and fused +
papillate +
bearing subulate enations +, hairy +  and bristly +
convex;conic +
dentate +  and smooth +
overlapping +
subulate +
unequal +
exalbuminous +
several;4;5 +
Weedy +, Introduced +  and Illustrated +
stramineous +
appendaged +  and truncate +
dilated +  and swollen +
enlarged +
Compositae +
Carthamus lanatus +
Carthamus +
species +
lobed +  and linear-lanceolate +
short-campanulate +  and cylindric +
expanded +
slender +
perennial +  and annual +
30 cm300 mm <br />0.3 m <br /> (180 cm1,800 mm <br />1.8 m <br />) +