Linaria hirta (L.) Moench, Meth., Suppl.: 170 (1802).
Annual, glandular-puberulent throughout or below, glandular-pubescent in inflorescence; fertile stems 1 (-3), (10-) 18-80 cm, erect, simple or branched above; sterile stems 0-5, ascending. Leaves of fertile stems (10-) 20-75 x 3-18 (-35) mm, oblong-lanceolate to elliptic, acute to obtuse, opposite or 3-verticillate below, alternate above; leaves of sterile stems broadly elliptic to obovate, acute to obtuse, opposite or alternate. Inflorescence with 3-35 flowers, dense in flower, becoming lax in fruit. Bracts 5-11 mm, elliptic, acute. Pedicels 0.5-1 mm in flower and fruit, erect. Calyx-lobes unequal, linear to elliptic, subacute to obtuse; adaxial lobe 5.5-11 x 3-4 mm; abaxial lobes 4-6 x 0.9-2 mm. Corolla (18 -) 25-40 mm, pale yellow with darker veins; tube 5-9 mm broad; adaxial lip sinus 2.5-5 mm; abaxial lip sinus 0.5-1 mm; spur 10-16 mm, 2-3.5 mm broad at base, straight or slightly curved, shorter than or subequalling rest of corolla. Capsule 5-7.5 x 4-6.5 mm, ovoid, glandular-pubescent. Seeds 1-1.3 mm, somewhat trigonous or tetrahedral, the margins obtuse to acute, with narrow longitudinal ridge, the intervening faces tuberculate with more or less contiguous ridges, cristate with short ridges or somewhat ruminate-alveolate, blackish-brown; hilum subbasal, in narrow depression; periclinal wall of testa-cells tabular or somewhat concave with raised margins, verruculate or rugulate, that of cells from base of tubercles or ridges with minute marginal papilla. Modified from Sutton (1988).
n = 6 (Viano, 1974: 326); 2n = 12 (Löve & Kjellqvist, 1974: 184).
S Iberian peninsula, NW Africa? Hs Lu Ma?
Type: [SPAIN]: "19 hirtum" Loefling 456 (syn.? (cf. Viano, 1978b: 248) LINN-767.39!).