Tussilago farfara

Linnaeus

Sp. Pl. 2: 865. 1753.

Common names: Coltsfoot
IntroducedIllustrated
Treatment appears in FNA Volume 20. Treatment on page 635.

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"
glabrescent +  and tomentulose +
not tailed +, rounded +  and obtuse +
papillate +
deltate;lanceolate or penicillate +
scarious +
usually ovate +  and lance-linear +
spiciform +, racemiform +, paniculiform +  and corymbiform +
indeterminate +  and determinate +
Theodore M. Barkley† +
Linnaeus +
decurrent +
5 cm50 mm <br />0.05 m <br /> (20 cm200 mm <br />0.2 m <br />) +
angled;5-12-lobed +
5 cm50 mm <br />0.05 m <br /> (20 cm200 mm <br />0.2 m <br />) +
winged;nerved;ribbed +
0.5 cm5 mm <br />0.005 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
smooth +  and barbellulate +
0.5 cm5 mm <br />0.005 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
Coltsfoot +
yellowish +  and yellow +
prismatic +  and cylindric +
1 cm10 mm <br />0.01 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
fertile +  and bisexual +
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 +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Disturbed sites, sandy or rocky soils, calcareous sites +
indeterminate +
heterogamous +  and homogamous +
each +  and sessile +
1 cm10 mm <br />0.01 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
cylindric;subturbinate +
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (1 cm10 mm <br />0.01 m <br />) +
sessile +  and petiolate +
cauline +  and basal +
lanceolate +  and lance-linear +
dentate to pinnatifid +  and entire +
denticulate +
2-carpellate +
0.8 cm8 mm <br />0.008 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
Flowering spring–summer. +
lance-linear +  and linear +
0.7 cm7 mm <br />0.007 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
bearing subulate enations +, hairy +  and bristly +
exalbuminous +
Introduced +  and Illustrated +
appendaged +  and truncate +
papillate +
not divided +
Compositae +
Tussilago farfara +
Tussilago +
species +
campanulate +
30 cm300 mm <br />0.3 m <br /> (50 cm500 mm <br />0.5 m <br />) +
5 cm50 mm <br />0.05 m <br /> (30 cm300 mm <br />0.3 m <br />) +
vine +, tree +, shrub +  and subshrub +