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Carduus crispus L.
Curly plumeless thistle

Life   Plantae   Dicotyledoneae   Asteraceae   Carduus

Carduus crispus
© Copyright Malcolm Storey 2011-2118 · 3
Carduus crispus

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Carduus crispus
© Copyright Malcolm Storey 2011-2118 · 3
Carduus crispus
Carduus crispus
© Copyright Malcolm Storey 2011-2118 · 3
Carduus crispus

Associates · map
FamilyScientific name @ source (records)
Halictidae  Halictus ligatus @ BBSL__BBSLID (2)
Microbotryaceae  Microbotryum cardui @ BPI (2)
Mycosphaerellaceae  Ovularia conspicua @ BPI (2)

Ovularia vossiana @ BPI (4)

Ramularia cardui @ BPI (3)
Peronosporaceae  Bremia lactucae @ BPI (3)
Phaeosphaeriaceae  Ophiobolus acuminatus @ BPI (7)
Pucciniaceae  Puccinia calcitrapae @ BPI (6)

Puccinia carduorum @ BPI (49)

Puccinia cirsii @ BPI (5)

Puccinia cnici-oleracei @ BPI (1)

Puccinia flosculosorum @ BPI (1)

Puccinia @ BPI (1)
Ustilaginaceae  Ustilago cardui @ BPI (1)
_  Fusicladiella melaena @ BPI (1)

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Carduus crispus L.
curly plumeless thistle

Image of Carduus crispus

General Information
Symbol: CACR2
Group: Dicot
Family: Asteraceae
Duration: Biennial
Growth Habit : Forb/herb
Native Status : CAN   I
L48   I
Data Source and Documentation
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Plants-NRCS Logos
green round image for nativity Native blue round image for introduced Introduced ocre round image for introduced and nativity Both white round image for no status Absent/Unreported
image for native, but no county data Native, No County Data image for introduced, but no county data Introduced, No County Data both introduced and native, but no county data Both, No County Data
Native Status:
lower 48 status L48    Alaska status AK    Hawaii status HI    Puerto Rico status PR    Virgin Islands status VI    Navassa Island NAV    Canada status CAN    Greenland status GL    Saint Pierre and Michelon status SPM    North America NA   


click on a thumbnail to view an image, or see all the Carduus thumbnails at the Plants Gallery

Steve Hurst. Provided by ARS Systematic Botany and Mycology Laboratory . United Kingdom, England. Usage Requirements .

Britton, N.L., and A. Brown. 1913. An illustrated flora of the northern United States, Canada and the British Possessions. 3 vols. Charles Scribner's Sons, New York. Vol. 3: 555. Provided by Kentucky Native Plant Society . Scanned by Omnitek Inc . Usage Requirements .




Click on a scientific name below to expand it in the PLANTS Classification Report.
Rank Scientific Name and Common Name
Kingdom Plantae – Plants
Subkingdom Tracheobionta – Vascular plants
Superdivision Spermatophyta – Seed plants
Division Magnoliophyta – Flowering plants
Class Magnoliopsida – Dicotyledons
Subclass Asteridae
Order Asterales
Family Asteraceae ⁄ Compositae – Aster family
Genus Carduus L. – plumeless thistle
Species Carduus crispus L. – curly plumeless thistle

Subordinate Taxa

This plant has no children

Legal Status

Noxious Weed Information
This plant is listed by the U.S. federal government or a state. Common names are from state and federal lists. Click on a place name to get a complete noxious weed list for that location, or click here for a composite list of all Federal and State Noxious Weeds .
Arkansas Carduus
thistle Noxious weed
Iowa Carduus
thistle Primary noxious weed
West Virginia curled thistle Noxious weed
U.S. Weed Information
Carduus Carduus crispus curled thistle welted thistle This plant and the related entity italicized and indented above can be weedy or invasive according to the authoritative sources noted below.This plant may be known by one or more common names in different places, and some are listed above. Click on an acronym to view each weed list, or click here for a composite list of Weeds of the U.S.
STATE Assorted authors. State noxious weed lists for 46 states . State agriculture or natural resource departments.

Wetland Status

Interpreting Wetland Status

Related Links

More Accounts and Images
ARS Germplasm Resources Information Network (CACR2)
Integrated Taxonomic Information System (CACR2)
Related Websites
Swedish Virtual Flora: images & text (in Swedish) (CACR2)
Texas A&M: Vascular Plant Image Gallery (CACR2)



Source Large Mammals Small Mammals Water Birds Terrestrial Birds


Source Large Mammals Small Mammals Water Birds Terrestrial Birds

Description of Values

Value Class Food Cover

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Following modified from Flora of North America
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FNA | Family List | FNA Vol. 19, 20 and 21 | Asteraceae | Carduus

2. Carduus crispus Linnaeus, Sp. Pl. 2: 821. 1753.

Welted or curled thistle, chardon crépu

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. 2 n = 16 (Sweden).

Flowering summer—fall (Jul—Sep). Weed of waste ground, pastures, roadsides, fields; 0—500 m; introduced; B.C., N.B., N.S., Ont., Que.; N.J., Pa.; Eurasia.

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.

Updated: 2020-06-06 17:35:18 gmt
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