Linaria japonica Miq., Annls. Mus. Bot. Lug.-Bat. 2: 115 (1865-1866).
Glaucous perennial, glabrous; fertile stems 1-numerous, 12-35 cm, ascending to suberect, usually branched from base, simple or branched above, the branches often verticillate; sterile stems not seen. Leaves 12-40 x 5-18 mm, the length 1.3-4 x breadth, oblong-elliptic to obovate, obtuse or apiculate, attenuate, with 1-3 prominent main veins, 3- or 4-verticillate or occasionally opposite. Inflorescence with 1-8 flowers, the lowermost often verticillate, alternate above, usually somewhat dense in flower and fruit. Bracts 2.5-8 mm, elliptic, acute to obtuse, the lowermost becoming leaf-like. Pedicels 4-9 mm in flower, 6-14 mm in fruit, erect. Calyx- lobes subequal, 3-5 x 1.3-2.2 mm, oblong to ovate, obtuse. Corolla 20-24 mm, yellowish-white, glabrous externally; tube 4.5-6 mm broad at mouth; adaxial lip sinus 2.5-4 mm; abaxial lip sinus 3.5-5.5 mm; spur 6-8 mm, 2-2.5 mm broad at base, straight, shorter than rest of corolla. Capsule 4.5-8 x 5-9 mm, subglobose, glabrous. Seeds 2.4-3 mm, discoid to somewhat trigonous, blackish-grey; wing 0.4-0.8 mm broad, usually thick and corky, occasionally compressed on one side, often indistinct from disc; disc smooth or sparsely tuberculate; tubercles broadly conical, rounded. Modified from Sutton (1988).
E Asia. Ch(Li) Jp Rs(Fs Fw).
Type: JAPAN: in littore maris Siebold s.n. (not located).