Linaria amethystea (Vent.) Hoffmanns. & Link, Fl. Port. 1(8): 253, tab. 47 (1811).
Glaucous annual, glabrous except for glandular-pubescent inflorescence, or stems occasionally glandular-puberulent towards base; fertile stems 1-30, ascending or erect, simple or branched; sterile stems 1-16. Leaves of fertile stems 4-25 x 0.3-3.5 mm, linear, narrowly elliptic or oblanceolate, acute, flat, in whorls of 4-5 below, alternate above; leaves of sterile stems resembling those of fertile stems but in whorls of 4. Inflorescence with 2-5 (-10) flowers, somewhat dense in flower. Bracts 0.7-4.5 mm, linear, acute. Pedicels 1-3 (-5) mm, erect. Calyx-lobes subequal, 3-4 x 0.6-1.4 mm, linear-oblong to narrowly oblanceolate, subacute. Corolla bluish-violet, cream or bright yellow, variably spotted with violet; tube slender; adaxial lip sinus (1-) 2-4 mm; lower lip sinus (0.9-) 1.2-2.3 mm; spur slender, straight or somewhat curved forwards. Capsule (2.5-) 3-4.5 mm, globose, glabrous or sparsely pubescent above. Seeds suborbicular, dark brown to black; hilum broad; wing usually conspicuously inflated, papillate on inner margin; disc reniform, papillate, tubercles numerous or rarely absent; periclinal wall of testa-cells tabular or papillate, verrucate to somewhat reticulate, the anticlinal wall of testa-cells angular with conspicuous ridge over junction. Modified from Sutton (1988).
SW Europe, NW Africa. Hs Lu Ma.
Type: USSR: “Hab. in montibus altaicis nec non Ulutavicus et Uralensibus. Riddersk” ex herb. Fischer (holo. LE?).