Perennial, dwarf shrub, up to 0.25 m high; erect, glabrous. Leaves opposite, ovate-lanceolate, acute, glabrous, 3-nerved. Flowers in terminal clusters. Hypanthium glabrous; tube slightly inflated below, widened above; sepals ovate, acute. Petaloid floral scales 4, membranous. Anthers: upper exserted on short thick filaments. Ovary oblong, compressed. Style as long as hypanthium tube, rigid. Stigma penicillate. Flowering time May.