Eucalyptus jensenii

Tree to 10 m tall. Forming a lignotuber.
Bark rough, coarse, hard, black, furrowed, i.e. typical ironbark, extending to branches ca 3 cm diameter.
Branchlets lack oil glands in the pith; glaucous or non-glaucous.
Juvenile growth (coppice or field seedlings to 50 cm): stems rounded in cross-section; juvenile leaves always petiolate, opposite at first then becoming alternate, ovate to elliptical, 3.8–6.5 cm long, (1.6)2–3 cm wide, base rounded to tapering, dull, grey-green.
Adult leaves alternate, petioles 0.3–2 cm long; blade ovate to lanceolate or elliptical, 4.3–11.5 cm long, 0.7–3(4) cm wide, base tapering, margin entire, apex pointed or rounded, concolorous, dull, green to grey-green or slightly glaucous, side-veins acute or greater than 45° to midrib, reticulation very dense, intramarginal vein present, oil glands scattered intersectional or apparently absent.
Inflorescence terminal compound and a few single axillary umbels also, peduncles 0.2–0.8 cm long, buds 7 per umbel, pedicels 0.1–0.3 cm long. Mature buds pyriform to obovoid, 0.3–0.4 cm long, 0.2–0.3 cm wide, glaucous or not glaucous, scar present (outer operculum shed early), operculum conical, stamens irregularly flexed, all fertile, anthers adnate, basifixed, cuboid, dehiscing by lateral slits, style straight and long, stigma blunt, locules 3, the placentae each with 4 vertical ovule rows. Flowers creamy white.
Fruit pedicellate or rarely sessile (pedicels to 0-0.3 cm long), barrel-shaped to truncate-globose or hemispherical or tending to obconical, 0.3–0.5 cm long, 0.3–0.5 cm wide, glaucous or non-glaucous, disc descending vertically, valves 3, near rim level but rarely visibly exserted.
Seeds brown to blackish, 1.3–3 mm long, flattened-ovoid, dorsal surface smooth to shallowly reticulate, hilum ventral.

Cultivated seedlings (measured at ca node 10): cotyledons small, reniform; stems square to ± rounded in cross-section, non-glaucous or rarely slightly glaucous; leaves always petiolate (petioles 0.2–0.7 cm), opposite for ca 8 to 15 nodes then becoming alternate, rarely still opposite at node 20, linear to narrowly lanceolate, 3.5–10 cm long, 0.4–1.5 cm wide, base tapering, apex ± pointed, dull, green to grey-green, not glaucous, concolorous or slightly discolorous.