Hyoscyamus albus L.  

A branched, glandular-hairy, grey-green biennial or herbaceous perennial. Stems 20 to 80 cm long. Lower leaves up to 12 cm long, broadly ovate, coarsely toothed, on long petioles; the upper ones, and floral bracts, smaller, ovate to elliptical, coarsely toothed or almost entire, with shorter petioles.  Flowers in dense, leafy  cymes, elongating up to 30 cm long when in fruit. Corolla glandular-hairy on the outside, 1.5 to 3.5 cm long, with 5 unequal, rounded lobes; cream or pale yellow, usually with a greenish or more usually a dark purple throat. Calyx 8 to 15 mm long, elongating in fruit, with triangular teeth which become spiny tipped in fruit. Capsule oval, 10 to 12 mm long.