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''Eucalyptus aequioperta'', commonly known as the Welcome Hill gum, is a mallee, sometimes a tree and is endemic to Western Australia. It has rough bark on the lower half of the trunk, lance-shaped leaves, flower buds in groups of between seven and fifteen, white flowers and more or less cup-shaped fruit.
Description
''Eucalyptus aequioperta'' is a mallee or sometimes a tree growing to a height of or more, and forms a lignotuber. The bark is a dark grey colour, firm and flaky to fibrous over the lower half of the trunk and extending to large limbs. The bark becomes slightly tessellated on older trees and on higher branches is smooth, dull and pinkish grey to white. Adult leaves are lance-shaped, glossy and a similar green on both sides. The leaf blade is linear to narrow lance-shaped or curved, long and wide with a petiole long. The flower buds are arranged in groups of between seven and fifteen in leafaxil
A leaf ( : leaves) is any of the principal appendages of a vascular plant stem, usually borne laterally aboveground and specialized for photosynthesis. Leaves are collectively called foliage, as in "autumn foliage", while the leaves, st ...
s, the groups on a peduncle Peduncle may refer to:
*Peduncle (botany), a stalk supporting an inflorescence, which is the part of the shoot of seed plants where flowers are formed
*Peduncle (anatomy), a stem, through which a mass of tissue is attached to a body
**Peduncle (art ...
long, individual buds on a pedicel
Pedicle or pedicel may refer to:
Human anatomy
*Pedicle of vertebral arch, the segment between the transverse process and the vertebral body, and is often used as a radiographic marker and entry point in vertebroplasty and kyphoplasty procedures
...
long. The buds are "egg-in-egg cup shaped" or spindle-shaped, long and wide. The operculum is long and equal in width or narrower than the floral cup
In angiosperms, a hypanthium or floral cup is a structure where basal portions of the calyx, the corolla, and the stamens form a cup-shaped tube. It is sometimes called a floral tube, a term that is also used for corolla tube and calyx tube. It ...
. The stamen
The stamen (plural ''stamina'' or ''stamens'') is the pollen-producing reproductive organ of a flower. Collectively the stamens form the androecium., p. 10
Morphology and terminology
A stamen typically consists of a stalk called the filame ...
s are white. Flowering has been observed in May and the fruit are cup-shaped to cone-shaped with the narrower end towards the base, long and wide.
Taxonomy
''Eucalyptus aequioperta'' was first formally described by the botanists Ian Brooker andStephen Hopper
Stephen Donald Hopper AC FLS FTSE (born 18 June 1951) is a Western Australian botanist. He graduated in Biology, specialising in conservation biology and vascular plants. Hopper has written eight books, and has over 200 publications to his n ...
in 1993 in the journal '' Nuytsia''. The type
Type may refer to:
Science and technology Computing
* Typing, producing text via a keyboard, typewriter, etc.
* Data type, collection of values used for computations.
* File type
* TYPE (DOS command), a command to display contents of a file.
* Ty ...
specimen was collected by Brooker near Mount Walker, north of Hyden in 1985. According to Brooker and Hopper, the specific epithet
In taxonomy, binomial nomenclature ("two-term naming system"), also called nomenclature ("two-name naming system") or binary nomenclature, is a formal system of naming species of living things by giving each a name composed of two parts, bot ...
(''aequioperta'') means "equal cover", but Francis Sharr noted that "the precise meaning is unclear".
''Eucalyptus aequioperta'' is part of the subgenus ''Symphyomyrtus'' section ''Dumaria'' in a sub-group of nine closely related species called series ''Ovulares''. The rough barked members of this series include ''E. aequioperta'', '' E. baudiniana'', '' E. brachycorys'', '' E. myriadena'' and '' E. ovularis'' and the smooth barked members include '' E. cyclostoma'', '' E. cylindrocarpa'', '' E. exigua'' and '' E. oraria''.
Distribution and habitat
The Welcome Hill gum grows in red sand on sandhills in the Avon Wheatbelt, Coolgardie and Malleebiogeographic regions
A biogeographic realm or ecozone is the broadest biogeographic division of Earth's land surface, based on distributional patterns of terrestrial organisms. They are subdivided into bioregions, which are further subdivided into ecoregions.
De ...
of Western Australia. It is found in an area between Corrigin in the west, Southern Cross and Coolgardie in the east but its distribution is not well known and may extend even further east.
Conservation status
This eucalypt is classified as "not threatened" by the Western Australian GovernmentDepartment of Parks and Wildlife
The Department of Parks and Wildlife (DPaW) was the department of the Government of Western Australia responsible for managing lands described in the ''Conservation and Land Management Act 1984'' and implementing the state's conservation and e ...
.
See also
* List of ''Eucalyptus'' speciesReferences
{{Taxonbar, from=Q15397293 Eucalypts of Western Australia Trees of Australia aequioperta Myrtales of Australia Plants described in 1993 Taxa named by Ian Brooker Taxa named by Stephen Hopper