A Web Guide to the Eucalypts
- 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 (32º 07'S, 120º 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,
59 cm long, 0.71.7 mm wide; Petioles terete, Petioles 1.3 mm long.
Lateral veins prominent, acute, moderately spaced. Intramarginal vein distinct,
continuous, 0.51 mm from margin.
Inflorescences: Conflorescence simple, axillary; Umbellasters
7-flowered, regular. Peduncles broadly flattened (48 mm wide), 812
mm long. Pedicels terete or angular, 13 mm long.
Flowers: Buds cylindrical (elongate), not glaucous or pruinose. Calyx
calyptrate; shedding early. Calyptra elongate obtuse, 3 times as long as
hypanthium (46 times), narrower than hypanthium; smooth. Hypanthium
smooth. Flowers yellow to green.
Fruits: Fruits hemispherical or globose (truncate), pedicellate,
34 locular, 68 mm long, 710 mm diam. Calyptra scar raised,
0.51 mm wide. Stemonophore raised, 0.20.5 mm wide. Disc flat or
raised, 0.51.5 mm wide. Valves exserted, vertically raised. Chaff
dimorphic, linear and cuboid.