Perennials, 50-100 cm tall. Stems erect, apically branched, glabrous. Leaves alternate; leaf blade ovate-lanceolate, 2.5-3.5 X 0.8-1 cm, glabrous, distinctly 3-veined. Inflorescences paniculate, with few to numerous flowers, glabrous except for corolla. Pedicel 3-5 mm, shorter than bracts. Calyx lobes narrowly lanceolate, 5-6 mm. Corolla pale yellow, 1.1-1.2 cm (excluding spur); spur 7-12 mm, slightly curved; tube wide; lower lip with whitish yellow pubescence in throat, lobes ovate, ca. 4 mm wide; apex of upper lip lobes acuminate. Capsule globose, as long as or slightly longer than calyx, 5-6 mm in diam. Seeds brown-gray, 3-angled, edges narrowly winged, reticulate-rugose. Fl. Jul.
"Colonial perennial, much like no. 2 [Linaria dalmatica (L.) Mill.], but the lvs narrower, lanceolate, tapering gradually to the pungent tip, and the fls smaller, 1.5–2.3 cm overall; 2n=12. Native of Europe, occasionally intr. in waste places in our range."