Crepis capillaris

(Linnaeus) Wallroth

Linnaea 14: 657. 1840.

Common names: Smooth hawksbeard crépis capillaire
Introduced
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

Distribution

V19-284-distribution-map.gif

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

Discussion

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

None.

Lower Taxa

None.

"fine" is not a number.

... more about "Crepis capillaris"
stipitate-glandular +, setose +, tomentose +  and glabrous +
glabrous +, setose +  and stipitate-glandular +
with appressed hairs +  and glabrous +
scarious +
ovate +  and lanceolate +
indeterminate +  and determinate +
David J. Bogler +
(Linnaeus) Wallroth +
runcinate +, lyrate +, lanceolate +  and linear or spatulate +
decurrent +
Lapsana capillaris +
compound +  and simple +
5 cm50 mm <br />0.05 m <br /> (30 cm300 mm <br />0.3 m <br />) +
lyrate;runcinate;oblanceolate;lanceolate;lyrate;runcinate;oblanceolate;lanceolate +
1cm;4.5cm +
tuberculate +, rugose +, muricate +  and smooth +
setose +, tomentulose +  and glabrous +
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
filiform +
stipitate-glandular +  and tomentulose +
lobing +, entire +  and lobed +
Smooth hawksbeard +  and crépis capillaire +
zygomorphic +, actinomorphic +  and (3-)5-merous +
0.8 cm8 mm <br />0.008 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
brownish yellow +
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 +
hispid +  and glabrous +
winged +  and beaked +
dispersed +
Meadows, pastures, lawns, roadsides, fields, waste places +
indeterminate +
each +  and sessile +
0.4 cm4 mm <br />0.004 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
cylindric;turbinate +
0.3 cm3 mm <br />0.003 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
cauline +  and basal +
toothed +
dentate +  and entire +
green +  and yellowish +
pinnately divided +  and sharply dentate +
2-carpellate +
persistent +
connate +  and distinct +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
Flowering May–Nov. +
connate +  and distinct +
8 +  and 16 +
0.6 cm6 mm <br />0.006 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
hairy +  and glabrous +
convex;flat +
spiculate-roughened +
exalbuminous +
Introduced +
1 (?) +  and 6 (?) +
appendaged +  and truncate +
papillate +
Crepis cooperi +  and Crepis virens +
Crepis capillaris +
species +
taprooted +  and rhizomatous +
biennial +  and annual +
10 cm100 mm <br />0.1 m <br /> (90 cm900 mm <br />0.9 m <br />) +
shrub +  and subshrub +
11 +, 6 +, 5 +, 4 +  and 3 +