The Eucalypts
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EucaLink         A Web Guide to the Eucalypts
Eucalyptus rigidula

Eucalyptus rigidula Maiden, Crit. Revis. Eucalyptus 7: 403 (1928).
TYPE: Western Australia, Comet Vale, J.H. Maiden, Sep 1909 (holo NSW, iso FRI, MEL). Cited as "J.H. Maiden (buds and fruits), September 1909, is the type,... " (from the protologue of E. angusta Maiden).
Eucalyptus angusta Maiden, Crit. Revis. Eucalyptus 6: 265 Plate 229 fig. 3 (1922).
TYPE: Western Australia, Comet Vale, J.H. Maiden, Sep 1909 (holo NSW, iso CANB, MEL).


Habit: Mallee, Height to 7 m high.
Bark: Bark smooth throughout, dull and powdery, white or grey or brown, shedding in long ribbons. Pith glands absent; Bark glands absent. Cotyledons bisected.
Leaves: Intermediate leaves disjunct late, narrow lanceolate to lanceolate, falcate, dull grey green, petiolate. Adult leaves disjunct, lanceolate to broad lanceolate, not falcate, acute, basally tapered, glossy, green or yellow-green, thick, concolorous, 5–9 cm long, 0.8–1.8 mm wide; Petioles terete to narrowly flattened or channelled, Petioles 0.8–1.6 mm long. Lateral veins obscure, obtuse, moderately spaced. Intramarginal vein obscure, continuous, 0.5–1.5 mm from margin.
Inflorescences: Conflorescence simple, axillary; Umbellasters 7-flowered. Peduncles terete, 5–12 mm long. Pedicels terete or angular, 2–5 mm long.
Flowers: Buds ovoid or fusiform, not glaucous or pruinose, 8–10 mm long, 3–4 mm diam. Calyx calyptrate; shedding early. Calyptra conical, 2 times as long as hypanthium or 3 times as long as hypanthium, as wide as hypanthium or wider than hypanthium; smooth. Hypanthium smooth. Flowers cream.
Fruits: Fruits hemispherical or ovoid, pedicellate, 3–4 locular, 5–9 mm long, 5–7 mm diam. Calyptra scar flat, 0.2–0.5 mm wide. Stemonophore flat, 0.5–1 mm wide. Disc depressed to flat, 1–2 mm wide. Valves enclosed, vertically raised. Seeds regular, ovoid, smooth, semi-glossy, grey-brown. Hilum ventral. Chaff dimorphic, linear and cuboid, chaff same colour as seed.

Distribution: W.A.

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