''Micromyrtus hexamera'' is a species of flowering plant in the myrtle

family Family (from ) is a Social group, group of people related either by consanguinity (by recognized birth) or Affinity (law), affinity (by marriage or other relationship). It forms the basis for social order. Ideally, families offer predictabili ...

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 Queensland. It is a shrub with erect or spreading branchlets, overlapping linear leaves, and white flowers arranged singly in leaf axils with 5

stamen The stamen (: stamina or stamens) is a part consisting of the male reproductive organs of a flower. Collectively, the stamens form the androecium., p. 10 Morphology and terminology A stamen typically consists of a stalk called the filament ...

s in each flower.

Description

''Micromyrtus hexamera'' is a shrub that typically grows up to high and has erect or spreading branchlets. Its leaves are overlapping, linear, long, wide and

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

petiole Petiole may refer to: *Petiole (botany), the stalk of a leaf, attaching the blade to the stem *Petiole (insect anatomy) In entomology, petiole is the technical term for the narrow waist of some hymenopteran insects, especially ants, bees, and ...

up to long. The leaves are

glabrous Glabrousness () 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 a plant or animal, or be due to loss because of a physical condition, ...

, have many 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 ...

, and the lower surface is keeled. The flowers are wide and arranged singly in leaf axils on a peduncle long, with 2

bracteoles 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 ...

about long at the base, but that fall off as the flowers open. There are 5 semicircular, translucent

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 lobes long, and 5 more or less round white petals in diameter. There are 5

s, the filaments about long. Flowering has been recorded in most months, with a peak around September.

Taxonomy

This species was first formally described in 1858 by

Ferdinand von Mueller Baron Sir Ferdinand Jacob Heinrich von Mueller, (; 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 Victoria, Australia ...

who gave it the name ''Baeckea leptocalyx'' in his ''

Fragmenta Phytographiae Australiae ''Fragmenta phytographiae Australiae'' is a series of papers written by the Victorian Government botanist Ferdinand von Mueller in which he published many of his approximately 2000 descriptions of new taxa of Australian plants. Including the p ...

''. In 1867,

George Bentham George Bentham (22 September 1800 – 10 September 1884) was an English botanist, described by the weed botanist Duane Isely as "the premier systematic botanist of the nineteenth century". Born into a distinguished family, he initially studie ...

transferred the species to the genus ''Micromyrtus'' as ''M. leptocalyx'' in his ''

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 b ...

''. 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 ...

(''leptocalyx'') means "slender sepals".

Distribution and habitat

This species of micromyrtus grows in deeply weathered sandstone hills in central Queensland, mainly between

Springsure Springsure is a rural town and Suburbs and localities (Australia), locality in the Central Highlands Region, Queensland, Australia. In the , the locality of Springsure had a population of 950 people. Geography Springsure is situated by road ...

and

Tambo Tambo may refer to: People * Adelaide Tambo (1929–2007), South African anti-apartheid activist * Dali Tambo (born 1959), South African anti-apartheid activist, TV presenter and also son of Oliver Tambo and Adelaide Tambo * Oliver Tambo (1917� ...

, but also near

Alpha Alpha (uppercase , lowercase ) is the first letter of the Greek alphabet. In the system of Greek numerals, it has a value of one. Alpha is derived from the Phoenician letter ''aleph'' , whose name comes from the West Semitic word for ' ...

, Mitchell and Morven.

References

{{Taxonbar, from=Q15372958 leptocalyx Flora of Queensland Myrtales of Australia Plants described in 1858 Taxa named by Ferdinand von Mueller