Sp. Pl.2: 821. 1753
Phenology: Flowering summer–fall (Jul–Sep).
Habitat: Weed of waste ground, pastures, roadsides, fields
Elevation: 0–500 m
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.
|Author||David J. Keil +|
|Basionyms||Asteraceae tribe Cynareae +|
|Common name||Welted or curled thistle + and chardon crépu +|
|Distribution||B.C. +, N.B. +, N.S. +, Ont. +, Que. +, N.J. +, Pa. + and Eurasia. +|
|Elevation||0–500 m +|
|Habitat||Weed of waste ground, pastures, roadsides, fields +|
|Illustration copyright||Flora of North America Association +|
|Illustrator||John Myers +|
|Phenology||Flowering summer–fall (Jul–Sep). +|
|Publication title||Sp. Pl. +|
|Publication year||1753 +|
|Source xml||https://firstname.lastname@example.org/aafc-mbb/fna-data-curation.git/src/f50eec43f223ca0e34566be0b046453a0960e173/coarse grained fna xml/V19-20-21/V19 46.xml +|
|Taxon family||Asteraceae +|
|Taxon name||Carduus crispus +|
|Taxon parent||Carduus +|
|Taxon rank||species +|
|Volume||Volume 19 +|