Sonchus oleraceus

Linnaeus

Sp. Pl. 2: 794. 1753.

Common names: Common sow-thistle laiteron
IntroducedIllustrated
Treatment appears in FNA Volume 19. Treatment on page 275. Mentioned on page 274.

Annuals or biennials, 10–140 (–200) cm. Stem-bases soft to hard, herbaceous, often hollow. Leaves: blades of mid cauline spatulate or oblong to obovate or lanceolate, 6–35 × 1–15 cm, bases auriculate, auricles deltate to lanceolate, ± straight, acute, margins usually pinnately (often runcinately) lobed, lobes ± deltate to lanceolate, not constricted at bases, terminals usually larger than laterals, entire or dentate. Peduncles usually glabrous, sometimes stipitate-glandular. Involucres 9–13+ mm. Phyllaries usually glabrous, sometimes tomentose and/or stipitate-glandular. Corollas: ligules ± equaling tubes. Cypselae dark-brown, mostly oblanceoloid, 2.5–3.5+ mm, ribs 2–4 on each face, faces transversely rugulose or tuberculate across and between ribs; pappi 5–8 mm. 2n = 32, 36.


Phenology: Flowering (Apr–)Jul–Oct (year-round in south).
Habitat: Disturbed sites, gardens, roadsides, along streams
Elevation: 0–2000 m

Distribution

V19-380-distribution-map.gif

Introduced; Greenland, St. Pierre and Miquelon, Alta., B.C., Man., N.B., Nfld. and Labr. (Nfld.), N.W.T., N.S., Ont., P.E.I., Que., Sask., Ala., Alaska, Ariz., Ark., Calif., Colo., Conn., Del., D.C., Fla., Ga., Idaho, Ill., Ind., Iowa, Kans., Ky., La., Maine, Md., Mass., Mich., Minn., Miss., Mo., Mont., Nebr., Nev., N.H., N.J., N.Mex., N.Y., N.Dak., Ohio, Okla., Oreg., Pa., R.I., S.C., S.Dak., Tenn., Tex., Utah, Vt., Va., Wash., W.Va., Wis., Wyo., Europe, also in Mexico, West Indies, Bahamas, Central America, South America, Africa, Asia, Pacific Islands (New Zealand), Australia

Discussion

Selected References

None.

Lower Taxa

None.

"fine" is not a number.

... more about "Sonchus oleraceus"
scarious +
ovate +  and lanceolate +
corymbiform +  and subumbelliform +
indeterminate +  and determinate +
acute;deltate;lanceolate +
Philip E. Hyatt +
Linnaeus +
auriculate +
compound +  and simple +
6 cm60 mm <br />0.06 m <br /> (35 cm350 mm <br />0.35 m <br />) +
oblong;obovate or lanceolate +
1 cm10 mm <br />0.01 m <br /> (15 cm150 mm <br />0.15 m <br />) +
tuberculate +, rugose +, muricate +  and smooth +
filiform +
barbellulate +  and smooth +
Common sow-thistle +  and laiteron +
zygomorphic +, actinomorphic +  and (3-)5-merous +
yellow +  and orange +
oblanceoloid +
Greenland +, St. Pierre and Miquelon +, Alta. +, B.C. +, Man. +, N.B. +, Nfld. and Labr. (Nfld.) +, N.W.T. +, N.S. +, Ont. +, P.E.I. +, Que. +, Sask. +, Ala. +, Alaska +, Ariz. +, Ark. +, Calif. +, Colo. +, Conn. +, Del. +, D.C. +, Fla. +, Ga. +, Idaho +, Ill. +, Ind. +, Iowa +, Kans. +, Ky. +, La. +, Maine +, Md. +, Mass. +, Mich. +, Minn. +, Miss. +, Mo. +, Mont. +, Nebr. +, Nev. +, N.H. +, N.J. +, N.Mex. +, N.Y. +, N.Dak. +, Ohio +, Okla. +, Oreg. +, Pa. +, R.I. +, S.C. +, S.Dak. +, Tenn. +, Tex. +, Utah +, Vt. +, Va. +, Wash. +, W.Va. +, Wis. +, Wyo. +, Europe +, also in Mexico +, West Indies +, Bahamas +, Central America +, South America +, Africa +, Asia +, Pacific Islands (New Zealand) +  and Australia +
0–2000 m +
tuberculate +  and rugulose +
winged +  and beaked +
dispersed +
Disturbed sites, gardens, roadsides, along streams +
indeterminate +
each +  and sessile +
connate +  and coherent +
0.5 cm5 mm <br />0.005 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
campanulate;urceolate +
0.9 cm9 mm <br />0.009 m <br /> (1.3 cm13 mm <br />0.013 m <br />) +
sessile +  and petiolate +
cauline +  and basal +
less deltate +  and lanceolate +
not constricted +
2-carpellate +
persistent +
0.5 cm5 mm <br />0.005 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
stipitate-glandular +  and glabrous +
Flowering (Apr–)Jul–Oct (year-round in south). +
connate +  and distinct +
stipitate-glandular +, tomentose +  and glabrous +
27 +  and 50 +
flat;convex +
2 +  and 4 +
exalbuminous +
Introduced +  and Illustrated +
soft +  and hard +
stipitate-glandular +  and glabrous +
appendaged +  and truncate +
papillate +
Undefined tribe Lactuceae +
Sonchus oleraceus +
species +
dentate +  and entire +
usually larger +
taprooted +, stoloniferous +  and rhizomatous +
140 cm1,400 mm <br />1.4 m <br /> (200 cm2,000 mm <br />2 m <br />) +
biennial +  and annual +
10 cm100 mm <br />0.1 m <br /> (140 cm1,400 mm <br />1.4 m <br />) +
shrub +  and subshrub +