Herbs, annual, 20-70 cm tall, glabrous or nearly so; stems erect, usually branched above middle. Basal leaves withered by anthesis; lower and middle stem leaves sessile; leaf blade obovate or narrowly elliptic, 8-10 × 3-4 cm, 2-pinnatipartite; primary lateral lobes 3-8-paired; ultimate lobes lanceolate, obliquely triangular or linear. Synflorescence a terminal cyme. Capitula (1 or)2-8, long pedunculate. Involucres cupular, 1.5-2.5 cm in diam.; phyllaries in 4 rows, inner ones ca. 1 cm. Ray achenes broadly 3-winged, wings adaxially projected into an apical rostrum. Disk achenes with 2 elevated ribs. Corona absent.
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