Shrubs or undershrubs; stems erect. Leaves simple, usually 1-3-pinnatisect; upper leaves sometimes less dissected, linear or trifid, acute. Inflorescence a spike or panicle, terminal, or in upper leaf axils; bracts small, deltoid. Flowers ±actinomorphic. Perianth segments free from base, ±equal, linear, spreading. Stamens epipetalous; filaments inserted towards bases of perianth segments, incurved and cohering around style near their apices; anthers erect, 2 locular, dehiscing longitudinally. Hypogynous glands absent. Ovary sessile, ellipsoidal, 1 locular; ovule solitary; style length equalling perianth; stigma capitate or slightly dilated. Fruit an ellipsoidal achene.
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