Neues Mag. Aerzte 5: 203. 1783.
Herbs, annual. Taproots slender. Stems ascending to erect, simple or sometimes branched proximally, terete. Leaves: cauline leaves connate proximally, sessile or sometimes petiolate (basal leaves); blade 1-veined, linear to linear-oblanceolate, not succulent, apex acute. Inflorescences terminal, 1–3-flowered, spreading cymes or flowers solitary; bracts paired, foliaceous, those of axillary flowers with scarious margins. Pedicels erect. Flowers: perianth and androecium hypogynous; sepals 4, distinct, green, lanceolate, 3.8–7 mm, herbaceous, margins white or silvery, scarious, apex acute; petals 4 or rarely absent, white, claw absent, blade apex entire; nectaries at base of filaments opposite sepals; stamens 4, inserted at base of ovary; filaments distinct nearly to base; staminodes absent; styles 4, filiform, 0.7–1 mm, glabrous proximally; stigmas 4, linear along adaxial surface of styles, minutely papillate (50×). Capsules cylindric, opening by 8 revolute teeth, shorter than or equaling sepals; carpophore absent. Seeds 35–55, brown, reniform with deep abaxial groove, laterally compressed, papillate, marginal wing absent, appendage absent. x = 19.
Introduced; Europe (Mediterranean region), in Africa (Republic of South Africa), Australia
Species 3 (1 in the flora).