Carduus myriacanthus Salzm. ex DC., it is an annual herb, up to 30cm. Stems simple or branched in the upper part, sub glabrous or slightly arachnoid. Basal leaves oblong-lanceolate, with 8-12 pairs of deeply lobed lobes and spines up to 4.5 mm long; upper surface with scattered multicellular hairs and lower surface arachnoid with multicellular hairs on the veins and unicellular hairs between the veins. Flower heads solitary or in groups of 2-3, sessile or sub sessile. Involucre 15-20 x 6-11 mm, sub ovoid, arachnoid. Middle bracts lanceolate, attenuate from the base, erect-spreading, with a scarious margin in the lower third and an apical spine up to 2 mm long. Flowers with a tube (5-) 6-8 mm and a limb 8-9.5 mm long. Achenes 4.3-4.8 x 1.8-2.2 mm, straw-yellow, with a globose, slightly five-lobed apical prominence 0.5-0.9 mm long. Pappus 13.5-17 mm long.
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