SG Heritage Dictionary

Umbelliferous [Adjective] Webster's Dictionary 1828

Producing the inflorescence called an umbel; bearing umbels; as umbelliferous plants.

Umbelliferous [Adjective] Webster's Dictionary 1913

1. Producing umbels.

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