2n = 36

Plants biennial, rarely perennial, 90– 370 mm tall. Leaves 15–127 mm long, 5.0–11.3 mm wide; petiole 1.5–5.2 mm wide. Flowering stems 1–7 per plant, terminal stem 1.3–7.0 mm diam. when fresh, 0.85–3.7 mm diam. when dry. Pedicels 1–2 per axil, 10–30 mm long, 0.64–1.1 mm diam. Flowers (5–)10–98 per plant, 11.0–15.5 mm long at anthesis. Calyx 5.2–8.5 mm long; lobes 2.9–4.4 mm long, 1.7–2.6(–2.8) mm wide. Corolla 11.0–14.6(–15.3) mm long, white, rarely pale violet or with veins violet. Filaments 6.4–9.2 mm long, (0.6–)0.8–1.2(–1.4) mm wide. Anthers (1.5–)2.0–2.7 mm long. FL late Dec–Mar.

Ab subspecie corymbiferae habitu graciliore, caule florifero terminali angustiore, in statu vivo 1.3–7.0 mm diametro, in sicco 0.85–3.7 mm diametro, foliis minoribus, angustioribus, 15–127 mm longis, 5.0–11.3 mm latis, lobis calycinis angustioribus 1.7–2.6(–2.8) mm latis, corolla breviore, 11.0–14.6(–15.3) mm longa, filamentis angustioribus, 0.8–1.2 mm latis, differt.