Tussilago farfara

Linnaeus

Sp. Pl. 2: 865. 1753.

Common names: Coltsfoot
IntroducedIllustrated
Treatment appears in FNA Volume 20. Treatment on page 635.
Revision as of 20:45, 27 May 2020 by imported>Volume Importer

Basal leaves: blades palmately 5–12-lobed or -angled, mostly 5–20+ × 5–20+ cm, margins irregularly denticulate. Cauline leaves mostly 5–25 mm. Calyculi: bractlets 5–15 mm. Phyllaries mostly 7–15 mm. Ray corollas: laminae (2–)4–10 mm. Disc corollas 10–12 mm. Cypselae 3–4 mm; pappi 8–12 mm, ± surpassing involucres. 2n = 60.


Phenology: Flowering spring–summer.
Habitat: Disturbed sites, sandy or rocky soils, calcareous sites
Elevation: 0–800 m

Distribution

V20-1433-distribution-map.gif

Introduced; Saint-Pierre and Miquelon, B.C., N.B., Nfld. and Labr. (Nfld.), N.S., Ont., P.E.I., Que., Conn., Ill., Ind., Maine, Md., Mass., Mich., Minn., N.H., N.J., N.Y., N.C., Ohio, Pa., R.I., Tenn., Vt., Va., Wash., W.Va., Wis., Eurasia.

Discussion

Flowering heads of Tussilago farfara close at night (laminae of ray corollas arch and roll inward). The species is becoming an invasive weed in some areas.

Selected References

None.

Lower Taxa

None.
... more about "Tussilago farfara"
Theodore M. Barkley† +
Linnaeus +
Coltsfoot +
Saint-Pierre and Miquelon +, B.C. +, N.B. +, Nfld. and Labr. (Nfld.) +, N.S. +, Ont. +, P.E.I. +, Que. +, Conn. +, Ill. +, Ind. +, Maine +, Md. +, Mass. +, Mich. +, Minn. +, N.H. +, N.J. +, N.Y. +, N.C. +, Ohio +, Pa. +, R.I. +, Tenn. +, Vt. +, Va. +, Wash. +, W.Va. +, Wis. +  and Eurasia. +
0–800 m +
Disturbed sites, sandy or rocky soils, calcareous sites +
Flowering spring–summer. +
Introduced +  and Illustrated +
Compositae +
Tussilago farfara +
Tussilago +
species +