The Eucalypts
***
Icons
of the
Australian
Bush
EucaLink         A Web Guide to the Eucalypts
Eucalyptus extensa

Eucalyptus extensa L.A.S. Johnson & K.D. Hill, Telopea 4(2): 218 (1991).
TYPE: Western Australia, 14.7 km N of Hyden-Norseman track along Mt. Day track, 123.0 km W of Norseman - Coolgardie rd (32 07'S, 120 29'E), K.D. Hill 626, L.A.S. Johnson, Blaxell, I. Brooker, S. Hopper, 7 Nov 1983 (holo NSW, iso FRI, K, PERTH).


Habit: Tree to Mallee, Height to 8 m high.
Bark: Bark smooth throughout, powdery, grey or grey-brown to green or yellow. Pith glands present; Bark glands absent. Cotyledons bisected.
Leaves: Intermediate leaves disjunct early, elliptic to ovate, straight, entire, dull grey green, petiolate. Adult leaves disjunct, narrow lanceolate or lanceolate or broad lanceolate, not falcate, acute, basally tapered to basally attenuate, glossy, green, thick or thin, concolorous, 5–9 cm long, 0.7–1.7 mm wide; Petioles terete, Petioles 1.3 mm long. Lateral veins prominent, acute, moderately spaced. Intramarginal vein distinct, continuous, 0.5–1 mm from margin.
Inflorescences: Conflorescence simple, axillary; Umbellasters 7-flowered, regular. Peduncles broadly flattened (4–8 mm wide), 8–12 mm long. Pedicels terete or angular, 1–3 mm long.
Flowers: Buds cylindrical (elongate), not glaucous or pruinose. Calyx calyptrate; shedding early. Calyptra elongate obtuse, 3 times as long as hypanthium (4–6 times), narrower than hypanthium; smooth. Hypanthium smooth. Flowers yellow to green.
Fruits: Fruits hemispherical or globose (truncate), pedicellate, 3–4 locular, 6–8 mm long, 7–10 mm diam. Calyptra scar raised, 0.5–1 mm wide. Stemonophore raised, 0.2–0.5 mm wide. Disc flat or raised, 0.5–1.5 mm wide. Valves exserted, vertically raised. Chaff dimorphic, linear and cuboid.

Distribution: W.A.

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