KEY TO THE SPECIES

1Fruiting calyx teeth nearly as long as the tube. Leaves generally ovate to broadly ovate, varying from glabrescent, hirsute to densely villose. Flowers usually numerous (over 20) in dense, axillary verticillasters forming together a terminal, dense, spurious-spicate inflorescence
1'Fruiting calyx teeth much shorter (less than ⅓) than the tube. Leaves generally narrowly oblong, always densely woolly. Flowers fewer (usually less than 15) in axillary verticillasters which are often distantly disposed