Corolla 5-lobed; lobes broad, entire, subequal, erect, spreading, tube enlarged above, somewhat incurved.
Flowers medium-sized, terminally racemose, pedicellate, bi-bracteolate.
Perennial, erect herb; stems simple or sparsely branched.
Leaves alternate, scale-like, entire.
Calyx campanulate, shortly 5-lobed.
Ovary bilocular.
Ovules numerous.