Primrose

n. [Lat. prima rosa, i. e., the first or an early rose in spring, from primus, first, and rosa, rose.] (Bot.) An early flowering plant of the genus Primula (P. vulgaris), closely allied to the cowslip, of several varieties, as the white, the red, the yellow-flowered, &c.

Evening primrose (Bot.), an erect plant (Œnothera biennis), with odorous, yellow flowers, that open in the evening. It is common in the United States.