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Carduus (the ancient Latin name of these plants). Compositae. Thistle. Spiny-leaved annual, biennial or perennial herbs, sometimes grown in borders and rock-gardens for the interesting habit and the heads of purple or white flowers.

Carduus (the ancient Latin name of these plants). Compositae. Thistle. Spiny-leaved annual, biennial or perennial herbs, sometimes grown in borders and rock-gardens for the interesting habit and the heads of purple or white flowers.

Carduus is sometimes united with Cirsium, but is here kept distinct, being separated chiefly by non-plumose or only indistinctly serrate pappus-bristles (see Cirsium). The common weedy thistles are referred either to Carduus or Cirsium, depending on the definition of the genus. Fig. 795 shows the spiny leaf of one of these. Under the restricted use of the name, Carduus comprises about 80 species, from the Canary Isls. to Japan. For C. benedictus, see Cnicus.

Carduus is sometimes united with Cirsium, but is here kept distinct, being separated chiefly by non-plumose or only indistinctly serrate pappus-bristles (see Cirsium). The common weedy thistles are referred either to Carduus or Cirsium, depending on the definition of the genus. Fig. 795 shows the spiny leaf of one of these. Under the restricted use of the name, Carduus comprises about 80 species, from the Canary Isls. to Japan. For C. benedictus, see Cnicus.

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