Eucalyptus microtheca F.Muell.

Coolabah (en)

Species

Angiosperms > Myrtales > Myrtaceae > Eucalyptus l'hér.

Characteristics

Tree to 10 m high, rarely more, or sometimes a mallee. Forming a lignotuber.Bark rough, whitish grey to dark grey, box-type, often deeply fissured, coarsely flaky or becoming tessellated, the branches commonly rough-barked though this feature is variable.Branchlets lacking oil glands in the pith; usually non-glaucous, rarely glaucous.Juvenile growth (coppice or field seedlings to 50 cm): stems rounded to square in cross-section, usually non-glaucous; juvenile leaves always petiolate, opposite for a variable number of nodes then alternate, narrowly lanceolate, 5–15 cm long, (0.3–) 0.5–2.5 cm wide, rounded or pointed at apex, bluish green to green.Adult leaves alternate; petiole 0.6–2 cm long; blade lanceolate to falcate, 5–19.5 cm long, 0.6–3 (–4.5) cm wide, base tapering to petiole, apex pointed or rounded, margin entire, concolorous, dull, green to blue-green or rarely glaucous, side-veins acute or at a wider angle to the midrib, reticulation very dense, intramarginal vein present, oil glands sparse, intersectional, or obscure.Inflorescence terminal compound, peduncles slender, 0.2–0.9 (–1.2) cm long, buds in 7s but umbels are sometimes irregular due to short internode elongation within the cluster, pedicels 0.1–0.3 cm long. Mature buds pyriform to obovoid or globular, 0.3–0.4 cm long, 0.2–0.3 cm wide, non-glaucous or glaucous, scar present (outer operculum lost early), operculum rounded and apiculate, rarely conical, stamens irregularly flexed, all fertile, anthers adnate, cuboid, dehiscing by lateral slits, style long, straight, stigma blunt, locules 3 or 4, the placentae each with 4 vertical ovule rows. Flowers white.Fruit on pedicel 0.1–0.3 cm long or, rarely, subsessile, truncate-globose to obconical, usually contracted at the top, 0.2–0.5 cm long, 0.3–0.7 cm wide, glaucous or non-glaucous, rim thin, rarely flared, disc descending vertically, narrow, valves 3 or 4, near rim level or barely exserted.Seeds dark brown, 1–2 mm long, flattened-ovoid, dorsal surface smooth, hilum ventral.
More
Tree to 20 m. Bark varies from smooth and white or grey throughout to rough, fibrous, grey to grey-black on trunk and often on larger branches. Juvenile leaves alternate, lanceolate to broadly lanceolate, green to grey-green or glaucous, slightly discolorous. Adult leaves lanceolate or narrowly lanceolate, acute; lamina 8-17 cm long, 0.8-2.5 cm wide, dull, green or grey-green; lateral veins clearly visible, at 35°-60°; intramarginal vein up to 1 mm from margin; petiole terete, 8-17 mm long. Umbels 7-flowered; peduncle terete, 3-9 mm long; pedicels 1-4 mm long. Buds usually ovoid, occasionally fusiform, often glaucous; operculum hemispherical, apiculate, or conical, 1-2 mm long, 2-3 mm wide; hypanthium obconical, c. 2 mm long, 2-3 mm wide. Fruits hemispherical or obconical, 1-5 mm long, 3-7 mm wide; disc very narrow, ascending, or absent; valves 3 or 4, strongly exserted.
Tree to 7 m. Bark rough, fibrous throughout, grey. Juvenile leaves not seen. Adult leaves lanceolate, sometimes falcate, acute; lamina 7–16 cm long, 1.5–3 cm wide, grey-green or subglaucous; lateral veins clearly visible, at 50°–60°; intramarginal vein up to 2 mm from margin; petiole terete, 5–10 mm long. Umbels 7-flowered; peduncle terete, 5–10 mm long; pedicels 1–3 mm long. Buds obovoid to pyriform; operculum saucer-shaped to almost hemispherical, 1–2 mm long, 3–4 mm wide; hypanthium ovoid to obconical, 2–3 mm long, 3–4 mm wide. Fruits subcampanulate or suburceolate, 3–5 mm long, 2–4 mm wide; disc very narrow, level; valves 3 or 4, included.
Tree to 20 m with bark rough throughout, grey to grey-black.. Juvenile leaves lanceolate; adult lanceolate, 8–17 cm long, 0.8–2.5 cm wide; petiole terete, 0.8–1.7 cm long.. Umbels 7-flowered, arranged in terminal panicles; peduncle terete, 3–9 mm long; pedicels 1–4[5] mm long.. Buds usually ovoid or sometimes fusiform, often glaucous; operculum hemispherical or conical, 1–2 mm long, 2–3 mm wide.. Fruits shallowly hemispherical to obconic, 1–5 mm long, 3–7 mm wide with or without a very narrow ascending disc; valves 3–4, strongly exserted.
A medium to large tree. It is often sprawling. It grows 10-20 m high and spreads 8-15 m wide. The bark is dark grey and fibrous. This extends to the upper branches. The leaves are grey-green. They are 15 cm long and narrow. The small buds are only 3 mm long and wide. They have a whitish coating and a cone-shaped cap. They occur in clusters. The flowers are white. The capsules are funnel-shaped and 4 mm long.
Life form perennial
Growth form tree
Growth support free-standing
Foliage retention evergreen
Sexuality hermaphrodite
Pollination entomogamy
Spread -
Mature width (meter) 5.25 - 8.75
Mature height (meter) 15.0
Root system -
Rooting depth (meter) 1.5
Root diameter (meter) -
Flower color
Blooming months
JanFebMar
AprMayJun
JulAugSep
OctNovDec
Fruit color -
Fruiting months
JanFebMar
AprMayJun
JulAugSep
OctNovDec
Nitrogen fixer -
Photosynthetic pathway c3

Environment

It grows in warm temperate regions. It can grow in arid or semiarid locations. It needs well drained soils but they can be wet or dry. It can grow in full sun or light shade. It can stand heavy frosts. It grows in areas with an annual rainfall between 125-1,020 mm. It can grow in salty and alkaline soils. It grows below 900 m above sea level.
More
Usually found on seasonally inundated clay to clay-loam soils around the edges of swamps or lagoons, or along watercourses.
 Found fringing seasonally dry watercourses, swamps, lakes and low-lying areas subject to temporary inundation.
Grows in clay soil on plains, as scattered trees and in open woodland.
Light 6-8
Soil humidity 4-8
Soil texture 2-6
Soil acidity -
Soil nutriment -
Hardiness (USDA) 9-12

Usage

A sweet manna like substance is edible The seeds can be ground and made into cake and eaten.
Uses animal food bee plant charcoal environmental use essential oil food fuel invertebrate food material medicinal timber wood
Edible barks roots saps seeds
Therapeutic use Antifungal agents (leaf), Tuberculosis (leaf), Antiseptic (unspecified), Disinfectant (unspecified)
Human toxicity -
Animal toxicity -

Cultivation

Can be grown by seedlings.
Mode seedlings
Germination duration (days) -
Germination temperacture (C°) -
Germination luminosity -
Germination treatment -
Minimum temperature (C°) -
Optimum temperature (C°) 24 - 39
Size -
Vigor -
Productivity -

Images

Eucalyptus microtheca unspecified picture

Distribution

Eucalyptus microtheca world distribution map, present in Australia, Brazil, Pakistan, and South Africa

Conservation status

Eucalyptus microtheca threat status: Least Concern

Identifiers

LSID urn:lsid:ipni.org:names:593129-1
WFO ID wfo-0000955371
COL ID 3BQ7W
BDTFX ID -
INPN ID 445835
Wikipedia (EN) Link
Wikipedia (FR) Link

Synonyms

Eucalyptus microtheca Eucalyptus raveretiana var. jerichoensis