Word Study
erigeron
CIDE DICTIONARY
erigeron, n.
a cosmopolitan genus of usually perennial herbs with asterlike flowers; the leaves were formerly used medicinally, but now are only occasionally so used. [WordNet 1.5]
OXFORD DICTIONARY
erigeron, n. any hardy composite herb of the genus Erigeron, with daisy-like flowers.
Etymology
Gk erigeron f. eri early + geron old man, because some species bear grey down
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