''Syzygium hemilamprum'', commonly known as the broad-leaved lilly pilly, blush satinash, cassowary gum, Eungella gum, and treated as ''Acmena hemilampra'' in New South Wales and Queensland, is a species of 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 speci ...

and is native to New South Wales, Queensland and the Northern Territory. It is a rainforest tree with broadly lance-shaped to elliptic leaves,

panicle A panicle is a much-branched inflorescence. (softcover ). Some authors distinguish it from a compound spike inflorescence, by requiring that the flowers (and fruit) be pedicellate (having a single stem per flower). The branches of a panicle are of ...

s of white flowers and more or less spherical white fruit.

Description

''Syzygium hemilamprum'' is a tree that typically grows to a height of with a

diameter at breast height Diameter at breast height, or DBH, is a standard method of expressing the diameter of the trunk or bole of a standing tree. DBH is one of the most common dendrometric measurements. Tree trunks are measured at the height of an adult's breast, ...

of up to . The trunk is flanged or buttressed in larger trees, and has fissured and flaky reddish-brown bark. The leaves are arranged in opposite pairs, broadly lance-shaped to elliptic, long and wide on a petiole long. The leaves are glossy and more or less

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 ...

on the upper surface and paler below. The flowers are arranged in panicles on the ends of branchlets, each flower 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

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 joined at the base forming a tube about in diameter, the sepal lobes small and inconspicuous. The petals are more or less circular, long and 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 long. Flowering occurs from October to November and the fruit is white and more less spherical, in diameter.

Taxonomy

This lilly pilly was first formally described in 1875 by

Ferdinand von Mueller Baron Sir Ferdinand Jacob Heinrich von Mueller, (german: Müller; 30 June 1825 – 10 October 1896) was a German-Australian physician, geographer, and most notably, a botanist. He was appointed government botanist for the then colony of Vict ...

and given the name ''Eugenia hemilampra'' in ''

Flora Australiensis ''Flora Australiensis: a description of the plants of the Australian Territory'', more commonly referred to as ''Flora Australiensis'', and also known by its standard abbreviation ''Fl. Austral.'', is a seven-volume flora of Australia published be ...

''. In the same publication, von Mueller also gave it the alternative name ''Eugenia smithii'' var. ''hemilampra'' and both names are validly published. In 1938,

Elmer Drew Merrill Elmer Drew Merrill (October 15, 1876 – February 25, 1956) was an American botanist and taxonomist. He spent more than twenty years in the Philippines where he became a recognized authority on the flora of the Asia-Pacific region. Through t ...

and

Lily May Perry Lily May Perry (1895-1992) was a Canadian-American botanist who worked at Arnold Arboretum and is most known for detailed compilation of information on medicinal plants of East and Southeast Asia and her assistance with the ''Flora of New Guinea ...

changed the name ''E. hemilampra'' to ''Acmena hemilampra'' in the ''

Journal of the Arnold Arboretum The Arnold Arboretum of Harvard University is a botanical research institution and free public park, located in the Jamaica Plain and Roslindale neighborhoods of Boston, Massachusetts. Established in 1872, it is the oldest public arboretum in N ...

'', and the name ''Acmena hemilampra'' Merr. & L.M.Perry is the name used by the

National Herbarium of New South Wales The National Herbarium of New South Wales was established in 1853. The Herbarium has a collection of more than 1.4 million plant specimens, making it the second largest collection of pressed, dried plant specimens in Australia,Thiers, B. ...

. Then in 2006,

Lyndley Craven Lyndley Alan Craven (3 September 1945 – 11 July 2014) was a botanist who became the Principal Research Scientist of the Australian National Herbarium. Lyndley ("Lyn") Craven worked for the CSIRO plant taxonomy unit of the New Guinea Survey Gro ...

and Edward Sturt Biffin changed von Mueller's ''E. hemilampra'' to ''Syzygium hemilamprum'' in the journal ''

Blumea ''Blumea'' is a genus of flowering plants of the family Asteraceae. Characteristics Genus ''Blumea'' is found in the tropical and sub-tropical zones of Asia, especially the Indian Subcontinent and Southeast Asia. A few species are found in Aust ...

''. The name ''Syzygium hemilamprum'' is accepted by the

Australian Plant Census The Australian Plant Census (APC) provides an online interface to currently accepted, published, scientific names of the vascular flora of Australia, as one of the output interfaces of the national government Integrated Biodiversity Information Syst ...

Distribution and habitat

Often seen on sand by the sea in

littoral The littoral zone or nearshore is the part of a sea, lake, or river that is close to the shore. In coastal ecology, the littoral zone includes the intertidal zone extending from the high water mark (which is rarely inundated), to coastal areas ...

rainforests, it reaches its best development in the red/brown volcanic soils, such as around the

Mount Warning Mount Warning ( Bundjalung: ''Wollumbin''), a mountain in the Tweed Range in the Northern Rivers region of New South Wales, Australia, was formed from a volcanic plug of the now-gone Tweed Volcano. The mountain is located west-south-west of Mu ...

caldera A caldera ( ) is a large cauldron-like hollow that forms shortly after the emptying of a magma chamber in a volcano eruption. When large volumes of magma are erupted over a short time, structural support for the rock above the magma chamber is ...

. The natural range of distribution is from Yamba to

Cape York Peninsula Cape York Peninsula is a large peninsula located in Far North Queensland, Australia. It is the largest unspoiled wilderness in northern Australia.Mittermeier, R.E. et al. (2002). Wilderness: Earth’s last wild places. Mexico City: Agrupación ...

in the far north eastern tip of

Australia Australia, officially the Commonwealth of Australia, is a Sovereign state, sovereign country comprising the mainland of the Australia (continent), Australian continent, the island of Tasmania, and numerous List of islands of Australia, sma ...

. Removal of the flesh from the seed is advised to assist seed germination. Germination is slow, taking up to 80 days. However, cuttings strike well.

References

*
(other publication details, included in citation)
{{Taxonbar, from1=Q15383267, from2=Q4674413 hemilamprum Myrtales of Australia Flora of New South Wales Flora of Queensland Flora of the Northern Territory Myrtaceae Taxa named by Ferdinand von Mueller