Coltsfoot

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.

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.

N. Africa, Europe, Asia eastwards to China, introduced in N. America.

2800-3800 m