Roots fibrous ending in prominent tubers. Stems c. 50 cm, few to several, usually unbranched, with an indumentum of small stellate-dendroid hairs. Leaves pinnatisect with entire rounded ultimate segments and a sparse indumentum of simple flaccid hairs (in ours). Verticillasters 5-10, 8-10-flowered. Bracts subulate, 2-3 mm. Calyx 12-15 mm, tubular-campanulate, with a dense indumentum of short stellate-dendroid hairs; teeth subtruncate with 1-2.5 mm spines. Corolla 30-35 mm, whitish or pale yellow with a darker lower lip clearly longer than upper lip.