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Subgenus Heterogaubaea L. Johnson & D. Blaxell, gen. nov.

Type: Heterogaubaea tenuipes (Maiden & Blakely) L. Johnson & Blaxell. Basionym: Eucalyptus tenuipes (Maiden & Blakely) Blakely & C.T. White, Proc. Roy. Soc. Queensland 42: 84 (1931).

Trees; bark persistent, long-fibrous. Juvenile leaves glabrous, opposite fo many pairs. Adult leaves glabrous, disjunct or opposite, dorsiventral. Venation fine, closely- spaced, oblique. Renantherin absent. Conflorescences lateral, probably thyrsoidal in nature but condensed to single umbellasters of 7 or more flowers. Sepals free, reduced, persistent. Corolla calyptriform; the 4 segments rather weakly united, often remaining free at the tips. Anthers ovate, dorsifixed, versatile, dehiscing by curved non- confluent slits. Stigma smooth, with short papillae, lobed. Ovules anatropous, in 4 vertical rows in each loculus. Cotyledons small, emarginate, orbicular, not folded in embryo. Seeds cuboid; hilum terminal. Fruit thin-textured; valves and capsule deeply enclosed.

Diagnosis: Bark fibrous, plant glabrous. Umbellasters lateral. Sepals free, persistent. Petals initially free, becoming united and calyptriform. Ovules in 4 vertical rows in each loculus.

Subtribe Eucalyptinae
  Genus Eucalyptus
    Subgenus Heterogaubaea
     Eucalyptus tenuipes   CQ

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