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Achenes obovoid-oblong or turbinate, 4–5-sided and obscurely ribbed on the angles, truncate at the apex, smooth or strongly rugose on the faces between the ribs, glabrous or sparsely setulose, minutely brown gland-dotted.
Capitula homogamous, numerous, in lax or ± dense clusters at the ends of branches, or the capitulum-clusters arranged in a large corymbiform cyme, occasionally the capitula somewhat scorpioidly arranged.
Leaves alternate or spirally arranged, opposite or whorled, sessile to shortly petiolate, felted-tomentose, sparsely pilose or glabrescent, glandular-punctate.
Pappus persistent, of ± united broad shiny scales lacerate on the upper margin, or of scales sometimes free and alternating with paleaceous setae.
Involucres campanulate to subglobose, florets exserted; phyllaries several-seriate, progressively larger to the inside.
Corollas purple or mauve, darker in the upper half, regularly 5-lobed, lobes lanate or pilose.
Anthers with a broad hyaline apical appendage and short acute tails at the base.
Stems many, densely leafy, with short internodes, branching above.
Pollen described as triporate, lophate and emicropunctate.
Vegetative indumentum of short-stalked flagelliform hairs.
Perennial herbs with annual stems from woody rootstocks.
Receptacle flat, shallowly alveolate.
Style-arms subulate, hairy outside.