''Medicosma elliptica'', commonly known as Bulburin medicosma, is a species of shrub or small tree in the family

Rutaceae The Rutaceae is a family, commonly known as the rueRUTACEAE
in BoDD – Botanical Derm ...

and is

endemic Endemism is the state of a species being found in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also found elsew ...

to a restricted area of Queensland. It has elliptical leaves and white flowers borne singly or in small groups in leaf axils.

Description

''Medicosma elliptica'' is a shrub or tree that typically grows to a height of with

glabrous Glabrousness (from the Latin ''glaber'' meaning "bald", "hairless", "shaved", "smooth") is the technical term for a lack of hair, down, setae, trichomes or other such covering. A glabrous surface may be a natural characteristic of all or part of ...

branchlets. The leaves are arranged in opposite pairs, leathery, elliptical or oval, long and wide on a petiole long. The leaves are glabrous and have many conspicuous oil dots. The flowers are arranged singly or in small groups in leaf axils and are

sessile Sessility, or sessile, may refer to: * Sessility (motility), organisms which are not able to move about * Sessility (botany), flowers or leaves that grow directly from the stem or peduncle of a plant * Sessility (medicine), tumors and polyps that ...

or 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 ...

up to long. The

sepal A sepal () is a part of the flower of angiosperms (flowering plants). Usually green, sepals typically function as protection for the flower in bud, and often as support for the petals when in bloom., p. 106 The term ''sepalum'' was coined b ...

s are about long and covered on the outside with soft hairs flattened against the surface. The

petal Petals are modified Leaf, leaves that surround the reproductive parts of flowers. They are often advertising coloration, brightly colored or unusually shaped to attract pollinators. All of the petals of a flower are collectively known as the ''c ...

s are white, long, densely covered with flattened hairs on the back, and remain on the fruit. Flowering has been observed in April and July and the fruit is a glabrous, wrinkled follicle long.

Taxonomy

''Medicosma elliptica'' was first formally described in 1985 by

Thomas Gordon Hartley Thomas Gordon Hartley (9 January 1931 in Beaumont, Texas – 8 March 2016 in Canberra, Australia) was an American botanist. Biography In 1955 Hartley graduated in botany with the academic degree Bachelor of Science at the University of Wisconsin-E ...

in the ''

Australian Journal of Botany The ''Australian Journal of Botany'' is a peer-reviewed scientific journal published by CSIRO Publishing. It covers all areas of plant biology, with a focus on Southern Hemisphere ecosystems. The editor-in-chief is Dick Williams (Commonwealth Sci ...

'' from specimens collected in the Bulburin State Forest in 1978.

Distribution and habitat

Bulburin medicosma grows in mountainous terrain on steep, rocky hillsides in vine forest with hoop pine (''

Araucaria cunninghamii ''Araucaria cunninghamii'' is a species of ''Araucaria'' known as hoop pine. Other less commonly used names include colonial pine, Queensland pine, Dorrigo pine, Moreton Bay pine and Richmond River pine. The scientific name honours the botanist a ...

''), brush box (''

Lophostemon confertus ''Lophostemon confertus'' (syn. ''Tristania conferta''), is an evergreen tree native to Australia, though it is cultivated in the United States and elsewhere. Common names include brush box, Queensland box, Brisbane box, pink box, box scrub, and ...

'') and Moreton Bay fig (''

Ficus macrophylla ''Ficus macrophylla'', commonly known as the Moreton Bay fig or Australian banyan, is a large evergreen banyan tree of the family Moraceae native to eastern Australia, from the Wide Bay–Burnett region in the north to the Illawarra in New So ...

''), in an area previously logged for hoop pine. It is found in the Many Peaks and

Dawes Range Dawes may refer to: Places * Dawes (Parish), New South Wales, Australia *Dawes Point, New South Wales, Australia * Dawes Arboretum, in Newark, Ohio, U.S. *Dawes County, Nebraska, U.S. * Dawes Township, Thurston County, Nebraska, U.S. Other uses *D ...

s in east-central Queensland.

Conservation status

This species is classified as "vulnerable" under the Australian Government ''

Environment Protection and Biodiversity Conservation Act 1999 The ''Environment Protection and Biodiversity Conservation Act 1999'' (Cth) is an Act of the Parliament of Australia that provides a framework for protection of the Australian environment, including its biodiversity and its natural and cultu ...

'' and the Queensland Government ''

Nature Conservation Act 1992 The ''Nature Conservation Act 1992'' is an act of the Parliament of Queensland, Australia, that, together with subordinate legislation, provides for the legislative protection of Queensland's threatened biota. As originally published, it prov ...

''. The main threats to the species are inappropriate fire regimes and invasion by the exotic weed ''

Lantana camara ''Lantana camara'' (common lantana) is a species of flowering plant within the verbena family (Verbenaceae), native to the American tropics. It is a very adaptable species, which can inhabit a wide variety of ecosystems; once it has been introduc ...

'', partly caused by disturbance caused by earlier logging of hoop pine.

References

{{Taxonbar, from=Q18083618 elliptica Sapindales of Australia Flora of Queensland Plants described in 1985 Taxa named by Thomas Gordon Hartley