Eucalyptus youmanii Blakely & Mckie

Species

Angiosperms > Myrtales > Myrtaceae > Eucalyptus l'hér.

Characteristics

Tree to 20 m tall. Forming a lignotuber.Bark rough to small branches, stringy, grey and grey-brown.Branchlets not glaucous; lacking oil glands in the pith.Juvenile growth (coppice or field seedlings to 50 cm): stems round in cross-section, densely stellate hairy throughout; juvenile leaves sessile to shortly petiolate (petioles 0.1–0.3 cm), opposite for few nodes soon becoming alternate, ovate to broadly so, 3–7.5 cm long, 2–4 cm wide (ratio length: width 1.5–2), bases appear stem-clasping if petiole very short but more commonly rounded or sometimes nearly truncate, margin entire, apex pointed, discolorous, darker green on upper side, setose only on petiole, margin and main veins underneath. At 50 cm tall new growth tips conspicuously stellate hairy.Adult leaves alternate, petiole 1.3–2.5 cm long; blade broadly lanceolate to lanceolate or falcate, 7–15 cm long, 1.4–3.2 cm wide, base tapering or oblique, concolorous, glossy green to greyish green, side-veins acute, sparsely reticulate, intramarginal vein parallel to margin, oil glands irregular, island.Inflorescence axillary unbranched, peduncles 1.5–2 cm long, thick and angular, buds 9 to ?15 per umbel, pedicellate (pedicels angular 0.2–0.4 cm long). Mature buds buds fusiform or more or less ovate, 0.7–0.9 cm long, 0.3–0.4 cm wide, longitudinally angled, yellowish, smooth, scar absent, operculum elongated conical (longer than hypanthium), stamens irregularly flexed, anthers reniform to cordate, versatile, dorsifixed, dehiscing by confluent slits, style long, stigma blunt or tapered, locules 4, the placentae each with 2 vertical ovule rows. Flowers white.Fruit pedicellate (pedicels 0.2–0.4 cm long), flattened-hemispherical, 0.6–0.7 cm long, 0.7–1 cm wide, disc level to raised-convex, valves 4, near rim level with tips only protruding.Seeds dark brown to blackish, 1.5–2.5 mm long, pyramidal or obliquely pyramidal, dorsal surface smooth, hilum terminal. Cultivated seedlings (measured at ca node 10): cotyledons reniform; not grown.
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Tree to 21 m. Bark grey to red-brown. Juvenile leaves ovate to orbicular, green, slightly discolorous. Adult leaves lanceolate, falcate, acuminate, thick; lamina 7.5–13 cm long, 1–2 cm wide, green, concolorous; lateral veins clearly visible, at 25°–35°; intramarginal vein up to 2 mm from margin; petiole channelled, 10–15 mm long. Umbels 7-flowered; peduncle flattened, 5–11 mm long; pedicels usually absent or occasionally 2–3 mm long. Buds fusiform, angular; operculum conical, 5–6 mm long, 5–7 mm wide; hypanthium obconical, 3–4 mm long, 5–7 mm wide. Fruits subglobular, often compressed by crowding and ribbed, 9–12 mm long, 10–15 mm wide; disc very broad, convex, ascending; valves 3, exserted.
Life form perennial
Growth form tree
Growth support free-standing
Foliage retention evergreen
Sexuality hermaphrodite
Pollination entomogamy
Spread -
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Mature height (meter) 15.0 - 20.0
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Nitrogen fixer -
Photosynthetic pathway c3

Environment

White acid soils, damp spots and occasionally on red basaltic soils. Locally frequent but restricted, in sclerophyll woodland on poor skeletal soils on rises of shale or acid volcanics, at elevations from 850-1,500 metres.
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Grows in sclerophyll forest on low hills and ridges, chiefly inpodsolic soils.
Light 7-9
Soil humidity 1-7
Soil texture 2-6
Soil acidity 3-7
Soil nutriment -
Hardiness (USDA) 8-12

Usage

Uses essential oil medicinal wood
Edible leaves
Therapeutic use Anti-bacterial agents (leaf), Antifungal agents (leaf)
Human toxicity -
Animal toxicity -

Cultivation

Can be grown by seedlings.
Mode seedlings
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Images

Eucalyptus youmanii unspecified picture

Distribution

Eucalyptus youmanii world distribution map, present in Australia

Conservation status

Eucalyptus youmanii threat status: Least Concern

Identifiers

LSID urn:lsid:ipni.org:names:593477-1
WFO ID wfo-0000956186
COL ID 3BQNT
BDTFX ID -
INPN ID -
Wikipedia (EN) Link
Wikipedia (FR)

Synonyms

Eucalyptus prominula Eucalyptus subtilior Eucalyptus youmanii Eucalyptus youmanii var. sphaerocarpa