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Stems stout (sometimes acaulescent). winged by the decurrent bases of the Lvs., which are large, alternate, prickly, dentate or pinnately cut: involucre globose, the bracts imbricated in many series, and in some cases spiny; receptacle flat, fleshy, honeycombed, not bristly; pappus not plumose, but with bristles in several series. —About 12 species, annual and biennial.
Stems stout (sometimes acaulescent). winged by the decurrent bases of the Lvs., which are large, alternate, prickly, dentate or pinnately cut: involucre globose, the bracts imbricated in many series, and in some cases spiny; receptacle flat, fleshy, honeycombed, not bristly; pappus not plumose, but with bristles in several series. —About 12 species, annual and biennial.
O. Salteri, Hort. "Plant pyramidal in habit, about 5 ft. high, silvery shining. Lowest Lvs. widely spreading on the ground, incised, spiny, upper reduced." Country unknown.
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