Slender perennial to 40 cm. Leaves dimorphic, sometimes uniform, lower radical or lacking, oblanceolate, cauline leaves linear, exstipulate. Flowers l-few in subcorymbose cymes, large, white, yellow, mauve to purple or red, with dark centre, stigmas multifid.
Slender, usually caulescent herbs 10-40 cm high, variable, the basal rosette absent at times. Roots 1-2, long, swollen, densely matted with root hairs. Stems (often reduced to scapes) unbranched, densely glandular pubescent. Leaves apetiolate (occasionally with an ill-defined sulcate petiole), exstipulate, dimorphous; primary leaves basal, rosulate, narrowly obovate, 12-20(-30) mm long, base attenuate, bearing both types of tentacles; cauline leaves laxly spaced, alternate, linear to linear-lanceolate, 2-4 cm long, 1-4 mm broad, apex acute, with some very long knob-bearing tentacles at the apex and along the upper margin and with numerous shorter ones. Inflorescence terminal, 1-several-flowered, the thin pedicels up to 3 cm. Calyx-lobes acute, about 9 mm long. Petals broadly obovate, up to 2 cm long, notched at the apex, white, yellow, mauve, pink, purple, dark red (Malmesbury district), with a dark green base. Stamens with short dark green filaments, connective rhomboid with the locules diverging. Styles divided from the base, long, patent-erect, apical stigmatic areas flabellately multifid. Capsule turbinate; seed ovoid-ellipsoid, brown, minutely honey-combed.