Eucalyptus insularis Brooker

Mallee to 2 m, sometimes to 8 m. Bark light grey, green-grey or yellow-green. Adult leaves narrowly lanceolate to lanceolate, sometimes falcate, uncinate, thick; lamina 4.5–7.5 cm long, 0.4–0.8 cm wide, green; lateral veins faint, at 20°–35°; intramarginal vein almost confluent with margin; petiole flattened or channelled, glandular, 4–8 mm long. Peduncle flattened or angular, recurved, 5–8 mm long; pedicels 3–5 mm long; operculum hemispherical, apiculate to long-pointed, 2–3 mm long, 3–4 mm wide; hypanthium obconical, 3–4 mm long and wide. Fruits 7–8 mm long, 5–6 mm wide; disc red-brown, shining.

Grows on gentle to moderate graniticslopes, in closed shrubland and heathland.