Perennial procumbent herb with ascending flowering stems. Leaves paired, petiolate; stipules ± triangular, basally joining the petioles to form a very short sheath, apically very shortly lobed. Flowers small, hermaphrodite, dimorphic but showing rather limited heterostyly, in few-flowered terminal and axillary mostly pedunculate cymes. Calyx-tube linear-fusiform; lobes 5, linear-oblong or slightly spathulate, equal or very nearly so, with sessile colleters between the lobes. Corolla-tube narrowly funnel-shaped; lobes 5, narrowly triangular-or oblong-lanceolate. Stamens included, the filaments long or short. Ovary 2-locular; ovules ± 18, attached uniseriately to elongate-fusiform centrally attached placentas; style included, long or short; stigma bifid, the lobes cylindrical-filiform, just exserted in the long-styled form. Fruit linear-fusiform, indehiscent. Rhaphides very abundant in all tissues.
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