''Zieria compacta '' is a plant in the citrus

family Family (from la, familia) is a Social group, group of people related either by consanguinity (by recognized birth) or Affinity (law), affinity (by marriage or other relationship). The purpose of the family is to maintain the well-being of its ...

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 eastern

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 ...

. It is an erect, bushy shrub with leaves composed of three leaflets, and white flowers with four

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 and four

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. It usually grows in rocky places on steep hills.

Description

''Zieria compacta'' is an erect, bushy shrub which grows to a height of about . The branches are smooth and lack obvious glands but are covered with a dense layer of hairs, especially when young. Its leaves are composed of three elliptic to egg-shaped leaflets with the middle leaflet long and wide and the others smaller. The leaf stalk is long. The upper surface of the leaves is

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 ...

and dark green while the lower surface is a paler green, covered with a thin, dense layer of hairs and has an obvious mid-vein. The flowers are white to pale pink and are arranged in groups of mostly six flowers (but sometimes as few as one or as many as 35) in leaf

axil A leaf ( : leaves) is any of the principal appendages of a vascular plant stem, usually borne laterally aboveground and specialized for photosynthesis. Leaves are collectively called foliage, as in "autumn foliage", while the leaves, st ...

s. The groups are usually about as long as the leaves. The four

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 ...

lobes are about long and hairy on the outside. The four petals are long and in common with other zierias, there are only four

s. Flowering occurs in spring and is followed by fruit which is a glabrous follicle composed of up to four sections joined at the base and which burst open to release their seeds when ripe. Zieria compacta (habit)

Taxonomy and naming

''Zieria compacta'' was first formally described in 1942 by

Cyril Tenison White Cyril Tenison ("C.T.") White (17 August 1890 – 15 August 1950) was an Australian botanist. Early life White was born in Brisbane to Henry White, a trade broker, and Louisa ''nee'' Bailey. He attended school at South Brisbane State School, an ...

in ''

Proceedings of the Royal Society of Queensland ''Proceedings of The Royal Society of Queensland'' is a multidisciplinary scientific journal published by The Royal Society of Queensland The Royal Society of Queensland was formed in Queensland, Australia in 1884 from the Queensland Philo ...

'' from a specimen collected near

Stanthorpe Stanthorpe is a rural town and locality in the Southern Downs Region, Queensland, Australia. In the , Stanthorpe had a population of 5,406 people. The area surrounding the town is known as the Granite Belt. Geography Stanthorpe lies on the New ...

. 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 ...

(''compacta'') is a

Latin Latin (, or , ) is a classical language belonging to the Italic branch of the Indo-European languages. Latin was originally a dialect spoken in the lower Tiber area (then known as Latium) around present-day Rome, but through the power of the ...

word meaning "thick" or "firm".

Distribution and habitat

This zieria mainly occurs south from the

Darling Downs The Darling Downs is a farming region on the western slopes of the Great Dividing Range in southern Queensland, Australia. The Downs are to the west of South East Queensland and are one of the major regions of Queensland. The name was generall ...

and

Fraser Island Fraser Island (Butchulla: ) is a World Heritage-listed island along the south-eastern coast in the Wide Bay–Burnett region, Queensland, Australia. The island is approximately north of the state capital, Brisbane, and is within the Fraser ...

Queensland ) , nickname = Sunshine State , image_map = Queensland in Australia.svg , map_caption = Location of Queensland in Australia , subdivision_type = Country , subdivision_name = Australia , established_title = Before federation , established_ ...

to the far south coast of

New South Wales ) , nickname = , image_map = New South Wales in Australia.svg , map_caption = Location of New South Wales in AustraliaCoordinates: , subdivision_type = Country , subdivision_name = Australia , established_title = Before federation , es ...

. It usually grows on steep rocky hillsides in poor soils near

granite Granite () is a coarse-grained (phaneritic) intrusive igneous rock composed mostly of quartz, alkali feldspar, and plagioclase. It forms from magma with a high content of silica and alkali metal oxides that slowly cools and solidifies undergro ...

sandstone Sandstone is a clastic sedimentary rock composed mainly of sand-sized (0.0625 to 2 mm) silicate grains. Sandstones comprise about 20–25% of all sedimentary rocks. Most sandstone is composed of quartz or feldspar (both silicates) ...

References

{{Taxonbar, from=Q18084250 compacta Sapindales of Australia Flora of New South Wales Flora of Queensland Plants described in 1942