'OEnothera biennis' definitions:

Definition of 'Oenothera biennis'

(from WordNet)
noun
A coarse biennial of eastern North America with yellow flowers that open in the evening; naturalized in Europe [syn: common evening primrose, German rampion, Oenothera biennis]

Definition of 'OEnothera biennis'

From: GCIDE
  • Rampion \Ram"pi*on\ (r[a^]m"p[i^]*[u^]n), n. [Cf. F. raiponce, Sp. ruiponce, reponche, L. raperonzo, NL. rapuntium, fr. L. rapum, rapa, a turnip, rape. Cf. Rape a plant.] (Bot.) A plant (Campanula Rapunculus) of the Bellflower family, with a tuberous esculent root; -- also called ramps. [1913 Webster]
  • Note: The name is sometimes given to plants of the genus Phyteuma, herbs of the Bellflower family, and to the American evening primrose ([OE]nothera biennis), which has run wild in some parts of Europe. [1913 Webster]