Shrubby, sturdy twiner; new stems villous with uniseriate, short based hairs with a long terminal cell (bicoloured, brown base, white elongated top cell). Seedling stage leaves crenulated, initially toothed, rapidly entire and becoming narrowly ellitpic. Adult leaves almost sessile, linear to narrowly elliptic, 25–50 mm long, 2–6 mm wide, margin flat to sinuate, both leaf surfaces softly hairy, glabrescent. Inflorescences are cymes of 1–4 flowers; rachis 10–15 mm long; peduncles 6–10 mm long, nodding. Sepals 2–3 mm long, with approximately equal lobes, both surfaces often silky hairy, outer surface glabrescent; acicular, purple, incurving, caducous. Petals free, 5–11 mm long, c. 3 mm wide, narrowly angular-obovate, apices rounded cuspidate, hairy, spreading rather than recurving; vivid azure blue, ‘white’ (palest mauve or blue), white; colour fades with age. Stamens distinctive; filaments equal to or shorter than anthers; anthers 3.3–4.5 mm long, sagittate, initially cohering at margins at anthesis pulling the apical slits open to act like pores (see Cheiranthera which has species doing the same) then becoming free; gold; pollen yellow. Pistil without visible basal nectary, ovary cylindrical to 7.5 mm long, silky white hairy with adpressed hairs, bilocular; style longer than half ovary length; stigma mostly bifid. Fruit berry-like with seeds in dry cells, 20–25 mm long, narrowly fusiform, initially green becoming purplish. Seeds colliculate.
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