Native to Eurasia, Coltsfoot (Tussilago farfara) now grows in a variety of disturbed habitats (e.g., roadsides, stream banks, railroad beds) across New England. Coltsfoot's bright yellow flower heads, which consist of narrow ray flowers and tiny 5-parted disk flowers (Common Dandelion has only ray flowers), are among the earliest wildflowers to bloom in spring. Flower stalks are hairy, with small, scale-like leaves; green leaves emerge later, and have densely hairy undersides.
Coltsfoot has both edible (the flowers, fleshy stems, and young leaves can be eaten raw or cooked) and medicinal (preparations of the leaves can help with treatment of coughs) uses, but since all of the local patches I know of are growing in spots that are unsafe to forage in, I've yet to experiment with the plant. For more details, read the account of Tussilago farfara in Ancestral Plants (Vol. 1, 2010, p. 190-91) by Arthur Haines and this Edible Flowers article by Green Deane.
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