Linaria multicaulis (L.) Miller, Gard. Dict. ed. 8: no. 7 (1768).
Perennial or sometimes flowering in the first year; fertile stems numerous or rarely few, simple or occasionally branched; sterile stems usually numerous. Leaves of fertile stems 15-40 mm, filiform or linear, acute, flat, alternate above, (3-) 4-6-verticillate at base; leaves of sterile stems 4-10 mm, oblong-lanceolate to narrowly elliptic, acute or subacute, mostly 4- to 6-verticillate. Inflorescence dense at least in flower. Bracts linear to linear-spathulate, acute. Pedicels erect. Calyx-lobes linear-lanceolate or oblong-lanceolate, subequal or somewhat unequal. Corolla usually yellow; spur slender, acute. Style deeply bifid. Capsule oblong-ovoid, emarginate, glabrous; loculi subequal or somewhat unequal, each loculus dehiscing by 3-5 teeth. Seeds reniform, reniform-trigonous or irregularly tetrahedral, transversely ridged or ruminate-alveolate, grey or blackish-grey; transverse ridges rounded or obtuse; periclinal wall of testa-cells verrucate or rugulate, the margins raised, forming angular papilla towards ridge-apex, the median papilla occasionally present, small, rounded, more or less isodiametric or elongate. Modified from Sutton (1988).
SC Europe, N Africa. Ag It Ma Si Tn.
Type: SICILY: (circa Panormum [Palermo] & alibi) "Linaria sicula, multicaulis, folio molluginis Bocc. Rar. Plant. 38" sine leg. (lectotype, chosen here, BM-Herb. Clifford. 324.7!).