''Pileanthus rubrinitidus'' is a flowering plant in the family

Myrtaceae Myrtaceae (), the myrtle family, is a family of dicotyledonous plants placed within the order Myrtales. Myrtle, pōhutukawa, bay rum tree, clove, guava, acca (feijoa), allspice, and eucalyptus are some notable members of this group. All ...

and is

endemic Endemism is the state of a species being found only 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 foun ...

to the

south-west The points of the compass are a set of horizontal, radially arrayed compass directions (or azimuths) used in navigation and cartography. A ''compass rose'' is primarily composed of four cardinal directions—north, east, south, and west—each ...

of Western Australia. It is an erect shrub with brownish-red young branches, linear leaves triangular in cross section, and reddish-orange flowers.

Description

''Pileanthus rubrinitidus'' is an erect shrub that typically grows to a height of up to and has brownish-red young branches with prominent oil

glands A gland is a Cell (biology), cell or an Organ (biology), organ in an animal's body that produces and secretes different substances that the organism needs, either into the bloodstream or into a body cavity or outer surface. A gland may also funct ...

producing a sticky secretion. The leaves are linear, triangular in cross section, long and less than wide. There are large, red,

stipule In botany, a stipule is an outgrowth typically borne on both sides (sometimes on just one side) of the base of a leafstalk (the petiole (botany), petiole). They are primarily found among dicots and rare among monocots. Stipules are considered part ...

outgrowths at the base of the leaves. The flowers are borne on a thin, yellowish red peduncle long with a pair of narrowly top-shaped

bracteole In botany, a bract is a modified or specialized leaf, associated with a reproductive structure such as a flower, inflorescence axis or cone scale. Bracts are usually different from foliage leaves in size, color, shape or texture. They also look ...

s long, the floral cup also top-shaped, long and wide. The five

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 Etymology The term ''sepalum'' ...

s are long and wide. Each flower is borne 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 and the petals are reddish-orange, long. Flowering occurs from late September to early November.

Taxonomy

This species was first formally described in 2022 by

Gregory John Keighery Gregory John Keighery is an Australian botanist. Since 2003 he has been a senior research scientist at the Science and Conservation Division of the Department of Biodiversity, Conservation and Attractions of Western Australia (formerly the Depar ...

who gave it the name ''Pileanthus rubronitidus'' in the journal ''

Nuytsia ''Nuytsia floribunda'' is a hemiparasitic tree found in Western Australia. The species is known locally as moodjar and, more recently, the Christmas tree or Western Australian Christmas tree. The display of intensely bright flowers during the ...

'' from specimens collected west-north-west of Yerina Spring in 1979. In 2019, Alex George noted in the '' Australian Systematic Botany Newsletter'', that the

specific epithet In Taxonomy (biology), taxonomy, binomial nomenclature ("two-term naming system"), also called binary nomenclature, is a formal system of naming species of living things by giving each a name composed of two parts, both of which use Latin gramm ...

is derived from the Latin "ruber" meaning 'red and "nitidus" meaning 'shining' and the epithet should therefore be ''rubrinitus''. In 2020, the epithet was corrected to ''rubrinitus'' in the journal ''

Distribution and habitat

''Pileanthus rubrinitidus'' grows in sand in heath or '' Banksia sceptrum'' shrubland between Kalbarri and the west of

Northampton Northampton ( ) is a town and civil parish in Northamptonshire, England. It is the county town of Northamptonshire and the administrative centre of the Unitary authorities of England, unitary authority of West Northamptonshire. The town is sit ...

in the

Geraldton Sandplains Geraldton Sandplains is an Interim Biogeographic Regionalisation for Australia, interim Australian bioregion of Western Australia. It has an area of . The Geraldton Sandplains is part of the larger Southwest Australia savanna ecoregion, as asses ...

and Murchison bioregions in the south-west of Western Australia.

Conservation status

''Pileanthus rubrinitidus'' is listed as "not threatened" by the Government of Western Australia

Department of Biodiversity, Conservation and Attractions The Department of Biodiversity, Conservation and Attractions (DBCA) is the Government of Western Australia, Western Australian government department responsible for managing lands and waters described in the ''Conservation and Land Management A ...

References

{{Taxonbar, from=Q15379475 rubrinitidus Plants described in 2002 Taxa named by Gregory John Keighery Endemic flora of Western Australia