''Leucopogon altissimus'' is a species of flowering plant in the heath family

Ericaceae The Ericaceae are a family of flowering plants, commonly known as the heath or heather family, found most commonly in acidic and infertile growing conditions. The family is large, with c.4250 known species spread across 124 genera, making it th ...

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 in the south of Western Australia. It is a tall, erect shrub 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, elliptic leaves and white or creamy-white flowers in groups in upper leaf axils or on the ends of branches.

Description

''Leucopogon altissimus'' is an erect shrub that typically grows up to about high and wide, with a single stem at the base, its young branchlets

. The leaves are elliptic, sometimes narrowly so, long and wide on a petiole up to long. The leaves are more or less flat and glabrous, the upper surface shiny and the lower surface a paler shade of green. The flowers are arranged in groups of seven to seventeen at the ends of branchlets, or in upper leaf axils, with egg-shaped

bract In botany, a bract is a modified or specialized leaf, especially one associated with a reproductive structure such as a flower, inflorescence axis or cone scale. Bracts are usually different from foliage leaves. They may be smaller, larger, or of ...

s long and similar

bracteoles In botany, a bract is a modified or specialized leaf, especially one associated with a reproductive structure such as a flower, inflorescence axis or cone scale. Bracts are usually different from foliage leaves. They may be smaller, larger, or of ...

, 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 egg-shaped, long and greenish. The petals are joined at the base to form a bell-shaped tube shorter than the sepals, the lobes creamy-white and long. Flowering mainly occurs from August to October and the fruit is a glabrous, elliptic

drupe In botany, a drupe (or stone fruit) is an indehiscent fruit in which an outer fleshy part (exocarp, or skin, and mesocarp, or flesh) surrounds a single shell (the ''pit'', ''stone'', or '' pyrena'') of hardened endocarp with a seed (''kernel'') ...

long.

Taxonomy and naming

''Leucopogon altissimus'' was first formally described in 2008 by

Michael Clyde Hislop Michael may refer to: People * Michael (given name), a given name * Michael (surname), including a list of people with the surname Michael Given name "Michael" * Michael (archangel), ''first'' of God's archangels in the Jewish, Christian and ...

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 he collected east of Albany in 2006. 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 ...

(''altissimus'') means "highest".

Distribution and habitat

This leucopogon mainly grows in a wide variety of habitats from sand dunes near the beach to dense heath on hilltops, but is only known from a small area between Two Peoples Bay, Cheyne Beach and Manypeaks in the

Esperance Plains Esperance Plains, also known as Eyre Botanical District, is a biogeographic region in southern Western Australia on the south coast between the Avon Wheatbelt and Hampton bioregions, and bordered to the north by the Mallee region. It is a pl ...

and

Jarrah Forest Jarrah forest is tall open forest in which the dominant overstory tree is ''Eucalyptus marginata'' (jarrah). The ecosystem occurs only in the Southwest Botanical Province of Western Australia. It is most common in the biogeographic region named in ...

biogeographic regions of southern Western Australia.

Conservation status

''Leucopogon altissimus'' is classified as " Priority Three" by the Government of Western Australia

Department of Biodiversity, Conservation and Attractions The Department of Biodiversity, Conservation and Attractions (DBCA) is the Western Australian government The Government of Western Australia, formally referred to as His Majesty's Government of Western Australia, is the Australian state de ...

, meaning that it is poorly known and known from only a few locations but is not under imminent threat.

References

{{Taxonbar, from=Q17242379 altissimus Ericales of Australia Flora of Western Australia Plants described in 2008