Closely related to
Marrubium anisodon, but with shorter stems (to 60 cm), smaller leaves (up to c. 20 x 30 mm) with upper surface (on dried material) darker than lower, calyx teeth 10 subequal, 1.5-2 mm, with Imitate or circinate tips in fruit, calyx tube 4-5.5 mm long, and corolla 7-8 mm long.