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DescriptionPerennial herbs (our spp.). Leaves opposite, very rough to the touch (in ours).Capitula terminal, solitary or in lax racemes, sometimes axillary, radiate, yellow, white, lilac or purple. Phyllaries 2-3-seriate. Receptacular scales clasping the florets, narrowly oblong to obovate. Achenes obovoid, bilaterally flattened, pubescent. Pappus a laciniate cupule, often with 2 barbellate setae in addition.