T. Farfara: leaves heart-shaped, angular or toothed, cottony beneath; flower-heads solitary, appearing before the leaves, with bright yellow ligulate ray-florets. - Moist waste places. Fl. March, April.
T. Petasites: leaves heart-shaped, unequally toothed, cottony; flower-heads in panicles, nearly dioecious, pinkish; the florets all tubular (males), or nearly all small and filiform (females), not ligulate. - Butterbur. - Moist meadows. Fl. April.