Eucalyptus protensa

Eucalyptus protensa is a mallee, sometimes a tree, that typically grows to a height of 4–10 m (13–33 ft) but does not form a lignotuber. It has smooth dark grey or brownish bark with an oily appearance. The adult leaves are the same shade of glossy dark green on both sides, narrow lance-shaped, 50–125 mm (2.0–4.9 in) long and 7–17 mm (0.28–0.67 in) wide tapering to a petiole 10–20 mm (0.39–0.79 in) long. The flower buds are arranged in leaf axils in groups of seven on an unbranched peduncle 7–13 mm (0.28–0.51 in) long, the individual buds on pedicels 3–7 mm (0.12–0.28 in) long. Mature buds are cylindrical, 29–40 mm (1.1–1.6 in) long and 6–9 mm (0.24–0.35 in) wide with a tapered, elongated operculum that is up to seven times as long as the floral cup. Flowering occurs from September to November and the flowers are yellowish green. The fruit is a woody, hemispherical to shortened spherical capsule 6–8 mm (0.24–0.31 in) long and 8–13 mm (0.31–0.51 in) wide with the valved protruding strongly.[2][3][4]

Eucalyptus protensa was first formally described in 1991 by Lawrie Johnson and Ken Hill from material collected 60 km (37 mi) east of Norseman in 1983.[3][5] The specific epithet (protensa) is from the Latin protensus meaning "stretched out" or "extended", referring to the long operculum.[2]

This eucalypt grows on undulating plains between Norseman and Balladonia in the Fraser Range.[2][4]

This mallee is classified as "not threatened" by the Western Australian Government Department of Parks and Wildlife,[4]

• List of Eucalyptus species