Eucalyptus oresbia (a tree) - vulnerable species listing
The Scientific Committee, established by the Threatened Species Conservation Act, has made a Final Determination to list the tree, Eucalyptus oresbia Hunter and Bruhl as a VULNERABLE SPECIES on Schedule 2 of the Act. Listing is provided for by Part 2 of the Act.
NSW Scientific Committee - final determination
The Scientific Committee has found that:
1. Eucalyptus oresbia was recently described by J. T. Hunter and J. J. Bruhl in 1999.
2. Eucalyptus oresbia (Myrtaceae), is described in Telopea, Vol. 8(2), (1999) as: a tree to 30 m tall. Bark smooth white, yellow or cream, rarely grey, sock absent or rarely present on younger trees to 1 m. Juvenile stems and branchlets usually strongly quadrangular. Leaves: seedling leaves ovate to elliptic, 3 - 10 cm long, 1 - 3.5 cm wide, plane, opposite, apex acute to obtuse, base rounded or more or less caudate, petiolate at first and then a few pairs sessile, concolorous; intermediate leaves ovate to lanceolate, 12 - 18 cm long, 3 - 6.5 cm wide, sub - opposite to alternate, apex acute to acuminate, more or less hooked, base rounded to more or less oblique; adult leaves lanceolate, falcate or more or less plane, 9.5 - 18 cm long, 1.2 - 2.2 cm wide, alternate, conspicuously glossy and dark green, margins entire, apex acuminate and often hooked, base attenuate, acute or oblique, petiole terete to flattened, barely channelled above, 1 - 2 cm long; venation 30 - 45o to midrib, intramarginal vein 0.5 - 2 mm from the margin, midrib channelled above. Inflorescence of axillary umbellasters. Flowers 6 - 7 per axel; peduncle 8 - 17 mm long, 2 - 5 mm wide; pedicel distinct in bud and fruit, 3 - 5 mm long in buds, 2 - 4.5 mm long in fruit; buds obloid to clavate, bulbous above and below the suture, more or less 1 - ribbed, 6 - 9.5 mm long; calyptra peaked hemispherical, acutely obconical or more or less rostrate, 2.5 - 5 mm long, 2 - 3.5 mm wide; hypanthium 2.5 - 5 mm long, 2 - 3.5 mm wide; style terete, 3 - 4 mm long; stamens with filaments 3.5 - 5 mm long, anthers dorsifixed, parallel, dehiscence longitudinal, 0.4 - 0.6 mm long, white, oil gland orbicular and abaxial. Fruit cupular, more or less 1 - ribbed, 4.5 - 8 mm long, 5 - 8 mm wide, often splitting on one side; disc level to descending, c. 1 mm wide; valves 3, more or less level. Seeds red - brown to black. Cotyledons bilobed.
3. The species is currently known from small areas in the Hanging Rock and the Wallabadah areas.
4. There are no records of this species from within conservation reserves. The small areas the species occupies makes it susceptible to stochastic events.
5. Threats include clearing, grazing and activities associated with road maintenance.
6. In view of 3, 4 & 5 above the Scientific Committee is of the opinion that the species is likely to become endangered in nature unless the circumstances and factors threatening its survival or evolutionary development cease to operate.
Proposed Gazettal date: 15/03/02
Exhibition period: 15/03/02 - 19/04/02