Webster's Revised Unabridged Dictionary · 1913

Umbelliferous

Umbelliferous , adjective

[Umbel + -ferous: compare French ombellifère.]

(a)
(Botany) Producing umbels.
(b)
(Botany) Of or pertaining to a natural order (Umbelliferae) of plants, of which the parsley, carrot, parsnip, and fennel are well-known examples.