Crepis capillaris

(Linnaeus) Wallroth

Linnaea 14: 657. 1840.

Common names: Smooth hawksbeard crépis capillaire
Basionym: Lapsana capillaris Linnaeus Sp. Pl. 2: 812. 1753
Synonyms: Crepis cooperi A. Gray Crepis virens Linnaeus
Treatment appears in FNA Volume 19. Treatment on page 228. Mentioned on page 223, 232.

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 proximally or throughout. Leaves: basal and cauline; petiolate (petiole bases clasping); blades lanceolate or oblanceolate, 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.

Phenology: Flowering May–Nov.
Habitat: Meadows, pastures, lawns, roadsides, fields, waste places
Elevation: 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.

Selected References


Lower Taxa

... more about "Crepis capillaris"
David J. Bogler +
(Linnaeus) Wallroth +
Lapsana capillaris +
Smooth hawksbeard +  and crépis capillaire +
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. +  and Europe. +
0–1300 m +
Meadows, pastures, lawns, roadsides, fields, waste places +
Flowering May–Nov. +
Introduced +
Crepis cooperi +  and Crepis virens +
Crepis capillaris +
species +