Annual herb, erect to 35 cm high or decumbent. Vegetative parts glandular, pilose to villous, arachnoid or white-lanuginose. Leaves sessile, with larger cauline leaves amplexicaul or semi-amplexicaul; radical and lower cauline leaves oblanceolate, spathulate or oblong, 10–70 mm long, 5–20 mm wide, serrate, dentate or entire; cauline leaves oblong, ovate-oblong, elliptic or oblanceolate (upper smaller leaves often oblong-linear, linear or narrow-lanceolate), 5–60 mm long, 2–13 mm wide, acute to attenuate, finely to coarsely serrate or dentate, with smaller leaves often entire. Capitula solitary, 6–8 mm long; peduncles to 80 mm long; involucral bracts pilose or villous, becoming glabrous; receptacle flat to convex, glabrous. Florets yellow. Disc corolla lobes glandular, glabrous. Achenes c. 1 mm long, faintly ribbed.
Frequently in clay or alluvial soils on river banks, in swamps, or along drainage lines; less often reported from drier sandstone habitats.
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