Carduus crispus

Linnaeus

Sp. Pl. 2: 821. 1753.

Common names: Welted or curled thistle chardon crépu
Introduced
Treatment appears in FNA Volume 19. Treatment on page 92. Mentioned on page 91.

Annuals or biennials, 30–150 cm. Stems openly branching, villous with curled, septate hairs to nearly glabrous, spiny wings to 1.5 cm wide, wing spines to 3 mm. Leaves: basal tapering to winged petioles, blades 10–20 cm, margins spiny-toothed to ± shallowly pinnately lobed; cauline sessile, gradually smaller, margins often more deeply divided, marginal spines to 3 mm; abaxial leaf faces ± tomentose with long, one-celled hairs and/or long, curled, septate hairs along veins or glabrate; adaxial faces sparsely hairy or glabrate. Heads borne singly or in groups of 2–5, 15–18 mm. Peduncles spiny-winged to near apex or throughout, to 4 cm. Involucres ± spheric, 12–17 × 12–17 mm. Phyllaries narrowly lanceolate, outer and middle with appressed bases ca. 1 mm wide and appressed to spreading appendages 0.5–1 mm wide, spine tips 1–1.5 mm, inner with unarmed, straight tips. Corollas purple or ± white, 11–16 mm, lobes ca. 3.5 times length of throat. Cypselae light-brown to gray-brown, 2.5–3.8 mm; pappus bristles 11–13 mm. 2n = 16 (Sweden).


Phenology: Flowering summer–fall (Jul–Sep).
Habitat: Weed of waste ground, pastures, roadsides, fields
Elevation: 0–500 m

Distribution

V19-46-distribution-map.gif

Introduced; B.C., N.B., N.S., Ont., Que., N.J., Pa., Eurasia

Discussion

Canadian distributions above follow R. J. Moore and C. Frankton (1974); I have not seen those specimens. Carduus crispus has been reported also from Arkansas, Connecticut, Iowa, Illinois, Maine, Maryland, Massachusetts, Missouri, New York, North Dakota, Ohio, Rhode Island, Vermont, Virginia, and West Virginia; I have not seen specimens from those states.

Two subspecies of Carduus crispus have been recognized (S. M. A. Kazmi 1964); those are not differentiated here.

Carduus crispus closely resembles the much more common C. acanthoides. Some published records of C. crispus are probably C. acanthoides. Although the degree of spininess and tough versus brittle stems were used as key characters (A. Cronquist 1980; H. A. Gleason and A. Cronquist 1991) to differentiate the two taxa, both characters are subjective, and the second is impractical with dry material.

Selected References

None.

Lower Taxa

None.

"fine" is not a number."timeslengthofthroat" is not declared as a valid unit of measurement for this property.

... more about "Carduus crispus"
glabrate +  and hairy +
short-tailed +
ascending +  and spreading or reflexed +
scarious +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
racemiform +, paniculiform +  and corymbiform +
indeterminate +  and determinate +
David J. Keil +
Linnaeus +
decurrent +
Asteraceae tribe Cynareae +
compound +  and simple +
10 cm100 mm <br />0.1 m <br /> (20 cm200 mm <br />0.2 m <br />) +
10-nerved or 20-nerved +  and rugose +
Welted or curled thistle +  and chardon crépu +
actinomorphic +
white +  and purple +
1.1 cm11 mm <br />0.011 m <br /> (1.6 cm16 mm <br />0.016 m <br />) +
light-brown +  and gray-brown +
compressed +  and ovoid +
fertile +  and bisexual +
B.C. +, N.B. +, N.S. +, Ont. +, Que. +, N.J. +, Pa. +  and Eurasia +
0–500 m +
glabrous +  and hairy +
pistillate +, staminate +  and neuter +
several;many +
winged +  and beaked +
dispersed +
Weed of waste ground, pastures, roadsides, fields +
septate +  and one-celled +
glabrate +  and glabrous +
indeterminate +
1.5 cm15 mm <br />0.015 m <br /> (1.8 cm18 mm <br />0.018 m <br />) +
each +  and sessile +
1.2 cm12 mm <br />0.012 m <br /> (1.7 cm17 mm <br />0.017 m <br />) +
1.2 cm12 mm <br />0.012 m <br /> (1.7 cm17 mm <br />0.017 m <br />) +
sessile +  and petiolate +
cauline +  and basal +
deltate +, usually narrowly triangular +  and more or less linear +
divided +, spiny-toothed +  and more or less shallowly pinnately lobed +
2-carpellate +
1.1 cm11 mm <br />0.011 m <br /> (1.3 cm13 mm <br />0.013 m <br />) +
persistent +
0 cm0 mm <br />0 m <br /> (4 cm40 mm <br />0.04 m <br />) +
Flowering summer–fall (Jul–Sep). +
appressed +  and spreading +
middle +  and outer +
papillate +  and smooth +
distinct +  and fused +
bearing subulate enations +, hairy +  and bristly +
flat;convex +
setiform +
exalbuminous +
Introduced +
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
appendaged +  and truncate +
dilated +  and swollen +
enlarged +
Compositae +
Carduus crispus +
species +
campanulate +
expanded +
straight +
slender +
200 cm2,000 mm <br />2 m <br /> (400 cm4,000 mm <br />4 m <br />) +
biennial +  and annual +
glabrate +  and tomentose +
30 cm300 mm <br />0.3 m <br /> (150 cm1,500 mm <br />1.5 m <br />) +
tree +, vine +, shrub +  and subshrub +
0cm +  and 1.5cm +
13 +, 11 +, 10 +, 9 +  and 8 +