Amphiasma

Perennial herbs or subshrubs; stems subterete, glabrous or glabrescent. Leaves sessile, slender to filiform, rigidly mucronate, margins revolute; stipule sheath mostly tubular, truncate or sometimes with 2 small cusps. Flowers isostylous or heterostylous; in terminal, sometimes also axillary cymes, rarely aggregated into corymbs, bracteate; bracts connate. Calyx 4-partite almost to base; lobes triangular. Corolla white, somewhat funnel-shaped; lobes shorter than tube, spreading, bearded on inner face to +/- middle. Stamens included in long-styled flowers, exserted in isostylous and short-styled flowers; filaments glabrous; anthers dorsifixed. Disc cushion-shaped, farinose. Ovary 2-locular, with fairly many ovules in each locule, attached to shortly stalked, shield-like placentas arising below middle of septum; style glabrous, included in short-styled flowers, exserted in long-styled and isostylous flowers; stigma lobes filiform, papillose. Fruit a globose loculicidal capsule, slightly beaked. Seeds dorsiventrally compressed, oblong, smooth, brown.