A slender-stemmed, herbaceous plant, 1 to 3 feet high from a deep, perennial root, stems erect, with sessile, narrowly linear leaves which are pale green or glaucous, one-half to 11/2 inches long, or the lower leaves longer. The stems often several or many together and simple or with a few branches. Flowers in erect, dense, terminal spikes or racemes. Calyx five-parted, the segments overlapping. Corolla about an inch long, spurred at the base, the spur nearly as long as the body of the corolla, the apex of the corolla two-lipped, the upper lip two-lobed and erect, light yellow, lower lip three-lobed and spreading, light yellow with a rounded projection or fold (palate), deep orange in color, which nearly closes the throat of the flower. Stamens four, in pairs and not projecting out of the flower.
In fields and waste places, everywhere common, often a troublesome weed. Naturalized from Europe. Flowering from June to October.
Memoir 15 N. Y. State Museum
Butter And Eggs; Ramstead - Linaria linaria