KEY TO THE SPECIES

1Twigs, lower side of leaves, hypanthium, and lower side of calyx lobes sparsely to moderately densely strigose-hirsute or villose, the hairs ± adpressed, up to 0.2 (rarely to 0.5) mm long. Calyx lobes elliptic or obovate, at base distinctly narrower than at maximum width, the apex rounded
1'Twigs, lower side of leaves, hypanthium, and lower side of calyx lobes densely hirsute, some of the hairs erect, c. 0.5 mm long. Calyx lobes triangular-ovate, at base very little or not narrower than at maximum width, the apex obtuse