Orobanche alba, Stephan ex Willd.

Tutin, T. G., Heywood, V. H., Burges, N. A., Moore, D. M., Valentine, D. H., Walters, S. M. & Webb, D. A., 1972, Flora Europaea. Volume 3. Diapensiacea to Myoporaceae, Cambridge: Cambridge University Press : 290

14. O. alba Stephan ex Willd. , Sp. Pl. 3: 350 (1800)

(O. epithymum DC. ).

Stems up to 35(-70) x 1 cm, slightly swollen at the base, glandular-pubescent, usually purplish-red. Leaves 12-20 mm, lanceolate. Spike 5-10(-20) x 2-4 cm, lax to moderately dense, glandular-pubescent; bracts 12-25 mm, lanceolate, acuminate; flowers fragrant. Calyx 8-16 mm; segments free, usually entire, with 1-3 conspicuous veins. Corolla 15-25 mm, glandular-puberulent especially distally, purplish-red, yellow or whitish, erecto-patent, broadly cylindrical-campanulate, slightly curved; upper lip entire or 2-lobed; lower lip glandular-ciliate, the middle lobe usually much the largest. Filaments densely hairy at least at the base, inserted 1-3 mm above the base of corolla; anthers subglabrous. Stigma red or purple. Capsule 10-12 mm. On Thymus and other Labiatae . Europe northwards to Scotland, Belgium and C. Russia; isolated stations in the Baltic islands. Al Au Be Br Bu Cr Cz Ga Ge G r Hb He Hs Hu It Ju Po Rm Rs (C, W, K, E) Si Su Tu.