Overview

Distribution

Range Description

Southern Tasmania.
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Ecology

Habitat

Habitat and Ecology

Systems
  • Terrestrial
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Conservation

Conservation Status

IUCN Red List Assessment


Red List Category
EN
Endangered

Red List Criteria
B1+2ce

Version
2.3

Year Assessed
1998
  • Needs updating

Assessor/s
World Conservation Monitoring Centre

Reviewer/s

Contributor/s

History
  • 1997
    Endangered
    (Walter and Gillett 1998)
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Population

Population
Only four stands survive, largely on private land. Calverts Hill harbours the largest subpopulation of 2,000 trees. East Risdon Nature Reserve has fewer than 20 trees and the other subpopulations are small and near roads.
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Threats

Major Threats
Agricultural expansion is the main reason for the species' decline.
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Wikipedia

Eucalyptus morrisbyi

Eucalyptus morrisbyi is a rare and endangered tree species endemic to south-eastern Tasmania. Its common name is Morrisby's Gum. It has two natural populations on the eastern shore of the Derwent River valley. The limited range of E. morrisbyi means effective management is required to maintain or expand the distribution of this species.

Taxonomy[edit]

Eucalyptus morrisbyi belongs to the family Myrtaceae and genus Eucalyptus. It can be further classified as part of the sub-genus Symphyomyrtus and series Viminales. It is most closely related to E. gunnii and E. archeri, however these species do not occur within breeding range of E. morrisbyi.

Growth habit[edit]

Mature Eucalyptus morrisbyi individuals grow between 6 and 12 metres in height. The upper trunk has smooth bark of a light white-grey or pink-grey appearance. If drought stress or fire are severe, lignotuber reshoots may form a mallee growth habit. The species' juvenile leaves are rounded, unstalked and glaucous. The adult leaves are arranged alternately and are 5 to 10 cm long and 1.5 to 4 cm wide. They are stalked and less glaucous than the juveniles.

Reproduction[edit]

The flower buds arise from the leaf axils in groups of three and are glacous with a pointed operculum. The woody capsules have sunken valves and are approximately 10 mm long. Eucalyptus morrisbyi flowers between February and May and its medium of pollination are birds and insects. Recruitment of E. morrisbyi occurs after disturnace through canopy stored seed or vegetative reproduction from lignotubers.

Management[edit]

There are a number of management issues concerned with Eucalpytus morrisbyi due to its rarity. E. morrisbyi is classed as endangered by both the Commonwealth Environmental Protection and Biodiversity Act 1999 and the Tasmanian Threatened Species Protection Act 1995. The two natural populations are assumed to be a remnant of a once larger range. The reduction in range can largely be put down to land clearing after the arrival of Europeans to Tasmania.

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