\Um`bel*lif"er*ous\, a. [Umbel + -ferous: cf. F.
ombillif[`e]re.] (Bot.)
(a) Producing umbels.
(b) Of or pertaining to a natural order ({Umbellifer[ae]}) of
    plants, of which the parsley, carrot, parsnip, and fennel
    are well-known examples.