Annual or short-lived perennial herb. Stems 0.45-0.75 m high, erect, straggling, laxly branched, woolly throughout. Leaves shortly petiolate below and sessile above; blade ovate, roughly serrate, hairy with long, soft, gland-tipped hairs; petioles 1-4 mm long. Flowers: solitary on long pedicels in upper leaf axils or arranged in racemes; stems, pedicels and calyx lobes clothed in similar hairs; spur narrow, extended conical, ± straight, 2.5-3.5 mm long; corolla white, mauve in throat, palate and tube floor yellow; Nov.-Feb. Fruit a capsule, 7-14 x (4-)5-7 mm, ovate-oblong to urceolate, obliquely truncate.
Annual or short-lived, perennial herb, up to 750 mm high; stems erect to straggling, laxly branched, most of plant woolly. Leaves petiolate below, ± sessile above; ovate, roughly serrate (more blunt than in N. pubescens). Flowers in upper leaf axils, or grouped in racemes. Bracts leaf-like, ± sessile. Corolla white, flushed pale pink or lilac, veins violet, palate and tube floor yellow; upper lobes oblong, palate papillate. Spur narrow, extended conical, ± straight, 2.5-3.5 mm long. Flowering time Sept.-Jan. Fruit of long capsules, 15 x 7 mm, ovate-oblong to urceolate, obliquely truncate.
Straggling herb, up to 450 mm tall. Leaves ovate, coarsely serrate, almost sessile, hairy with long, soft gland-tipped hairs. Stems, pedicels and calyx lobes clothed in similar hairs. Inflorescence with flowers solitary on long pedicels in upper leaf axils. Capsules (3-)7-14 x (4-)5-7 mm. Flowers white, mauve in throat.
A herb. It grows 45-75 cm tall. The branches are straggling and woolly. The leaves 1.5-5 cm long and have rough teeth. The flowers are in the axils of leaves.