Annuals or biennials, 10-90 cm (taproots shallow). Stems 1(-6+), erect to ± procumbent, usually simple (usually with single stout leader, sometimes multiple with slender laterals), hispid proxi-mally or throughout. Leaves: basal and cauline; petiolate (petiole bases clasping); blades lanceolate or ob-lanceolate, runcinate or lyrate, 5-30 × 1-4.5 cm, margins pinnately divided to sharply dentate (lobes remote, unequal), apices obtuse or acute, mucronate, faces glabrous or sparsely hispid (hairs yellow; proximal cauline auriculate and clasping). Heads 10-15(-30+), in corymbiform arrays. Calyculi of 8, linear, tomentulose or stipitate-glandular bractlets 2-4 mm. Involucres cylindric to turbinate, 5-8 × 3-6 mm. Phyllaries 8-16, lanceolate, 6-7 mm (margins scarious), apices acute, abaxial faces stipitate-glandular and glandular setose (setae black, usually in 2 rows), adaxial glabrous. Florets 20-60. corollas deep yellow (reddish abaxially), 8-12 mm (hairy). Cypselae brownish yellow, fusiform, 1.5-2.5 mm, apices narrowed (not beaked), ribs 10 (glabrous or scabrous); pappi white (fluffy), 3-4 mm (scarcely surpassing phyllaries). 2n = 6. Flowering May-Nov. Meadows, pastures, lawns, roadsides, fields, waste places; 0-1300 m; introduced; Alta., B.C., N.B., N.S., Ont., Que.; Alaska, Ark., Calif., Colo., Conn., Del., D.C., Idaho, Ill., Ind., Iowa, Ky., Maine, Md., Mass., Mich., Miss., Mo., Mont., Nev., N.H., N.J., N.Y., N.C., N.Dak., Ohio, Oreg., Pa., R.I., Tenn., Tex., Utah, Vt., Va., Wash., W.Va., Wis.; Europe. Crepis capillaris is recognized by its shallow root system, dense rosettes of coarsely dentate or pinnately lobed leaves, erect slender stems, auriculate-based cauline leaves, relatively small heads, phyllaries with double rows of black setae, and fluffy white pappi. It is weedy and can become a serious lawn pest. It is one of only three species of Crepis with 2n = 6; E. B. Babcock (1947) considered it to be advanced in the genus.