| 1 | Leaves hairy beneath. Inflorescence terminal, rusty tomentose, with stellate and branched hairs. Calyx thick, campanulate, 2½-3½ cm woolly-tomentose outside. Corolla thick, 6-7 cm, whitish to yellowish. Capsule twisted, rusty-tomentose, 10-ribbed |
| 1' | Leaves glabrous except a few short hairs of the domatia. Inflorescences lateral, with appressed, fine, partly stellate hairs. Calyx tubular, thin, c. 1-1¼ cm by 3 mm, fine appressed stellate-hairy. Corolla thin, pink, short-hairy outside, c. 4-5 cm. Capsule straight or ± twisted, glabrous, smooth. |
