Zieria obcordata

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Obcordate-leafed zieria
Zieria obcordata.jpg
Scientific classification Red Pencil Icon.png
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Sapindales
Family: Rutaceae
Genus: Zieria
Species:
Z. obcordata
Binomial name
Zieria obcordata

Zieria obcordata, commonly known as obcordate-leafed zieria, is a plant in the citrus family Rutaceae and endemic to New South Wales. It is an aromatic, densely branched, rounded shrub with small, hairy, three-part leaves and up to three white to pale pink flowers with four petals and four stamens arranged in the leaf axils. It occurs in two disjunct populations in the central-west of the state.

Contents

Description

Zieria obcordata is an aromatic, densely-branched, rounded shrub which grows to a height of 0.5 m (2 ft) and has hairy branches when young. The leaves are composed of three wedge-shaped to heart-shaped leaflets with the narrower end towards the base. The leaves have a petiole 1–3 mm (0.04–0.1 in) long and the central leaflet is 3–9 mm (0.1–0.4 in) long and 1–4 mm (0.04–0.2 in) wide. The upper surface of the leaflets is slightly warty and both surfaces are covered with simple hairs. The flowers are white to pale pink and are arranged singly or in groups of up to three in leaf axils, the groups shorter than the leaves. The sepals are triangular, about 2 mm (0.08 in) long and wide and hairy. The four petals are about 2 mm (0.08 in) long and sometimes hairy. Flowering occurs mainly in September and October and is followed in summer by fruit which are warty, hairy capsules. [2] [3]

Taxonomy and naming

Zieria obcordata was first formally described in 1825 by Allan Cunningham and the description was published in Geographical Memoirs on New South Wales. [1] [4] The specific epithet (obcordata) is derived from the Latin word cordata meaning "heart-shaped" [5] :231 with the prefix ob- meaning "towards". [5] :566

Distribution and habitat

This zieria grows in open shrubby woodland and on rocky hillsides in two disjunct populations near Wellington and near Bathurst. It often occurs with rough-barked angophora ( Angophora floribunda ) and hickory wattle ( Acacia implexa ) and weeping boree ( Acacia vestita ).

Conservation

Obcordate-leafed zieria is classified as "endangered" under the New South Wales Threatened Species Conservation Act and the Commonwealth Government Environment Protection and Biodiversity Conservation Act 1999 (EPBC) Act. The main threats to the species are weed invasion, inappropriate fire regimes, grazing and land clearing. [3]

Related Research Articles

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Zieria aspalathoides, commonly known as the whorled zieria, heath zieria, hairy zieria or heathy zieria, is a plant in the citrus family Rutaceae and is endemic to eastern Australia. It is a heath-like shrub with leaves that appear to be whorled and with pink flowers in groups of three, each with four petals and four stamens.

<i>Zieria adenophora</i> Species of flowering plant

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<i>Zieria arborescens</i> Species of flowering plant

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<i>Zieria adenodonta</i> Species of flowering plant

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<i>Zieria tuberculata</i> Species of flowering plant

Zieria tuberculata, commonly known as warty zieria, is a plant in the citrus family Rutaceae and is endemic to a small area on the south coast of New South Wales. It is a shrub with warty, hairy branches and leaves and large groups of creamy-white, four-petalled flowers in late winter to spring.

<i>Zieria buxijugum</i> Species of flowering plant

Zieria buxijugum, commonly known as the Box Range zieria, is a plant in the citrus family Rutaceae and is endemic to a small area on the south coast of New South Wales. It is a dense, rounded shrub with strongly scented, velvety, clover-like leaves composed of three leaflets. In early spring there are large clusters of small white flowers with four petals near the ends of the branches.

Zieria distans is a plant in the citrus family Rutaceae and is only found on a few isolated mountains in Queensland. It is a straggly shrub with wiry branches, warty, three-part leaves and clusters of up to about twenty small white flowers, each with four petals and four stamens, in the leaf axils.

Zieria eungellaensis is a plant in the citrus family Rutaceae and is only found on a few isolated mountains in Queensland. It is a compact but open shrub with wiry branches, three-part leaves and flowers in small groups, each flower white or pink with four petals and four stamens, and is endemic to the Eungella National Park.

<i>Zieria floydii</i> Species of flowering plant

Zieria floydii, commonly known as the Floyd's zieria, is a plant in the citrus family Rutaceae and is endemic to the New England Tableland in New South Wales. It is an erect shrub with warty, hairy branches, three-part, clover-like leaves and clusters of creamy-white flowers with four petals and four stamens.

<i>Zieria formosa</i> Species of flowering plant

Zieria formosa, commonly known as the shapely zieria, is a plant in the citrus family Rutaceae and is endemic to a small area on the south coast of New South Wales. It is a dense, rounded shrub with velvety, clover-like leaves composed of three leaflets. In spring there are clusters of small, pale pink flowers with four petals near the ends of the branches. It is similar to the Box Range zieria which has a similar distribution, but has wider leaflets and an appendage on its anthers.

<i>Zieria fraseri</i> Species of shrub

Zieria fraseri is a plant in the citrus family Rutaceae and is endemic to eastern Australia. It is a dense, bushy shrub with leaves composed of three leaflets, and white flowers with four petals and four stamens. It usually grows in rocky places on steep hills.

Zieria graniticola is a plant in the citrus family Rutaceae and is a dense, compact shrub with erect wiry branches, three-part leaves and pale pink flowers in groups of up to three, each with four petals and four stamens. It is only known from two population near Stanthorpe in Queensland, Australia.

Zieria hindii, commonly known as the Hind's zieria, is a plant in the citrus family Rutaceae and is endemic to a small area in north-eastern New South Wales. It is an erect, slender shrub with warty branches, three-part, clover-like leaves, and clusters of small white flowers with four petals and four stamens. It is only known from the Nightcap Range.

<i>Zieria ingramii</i> Species of flowering plant

Zieria ingramii, commonly known as Keith's zieria, is a plant in the citrus family Rutaceae and is endemic to a small area in central New South Wales. It is a slender, spindly, aromatic shrub with three-part, clover-like leaves and clusters of about seven white to pale pink flowers with four petals and four stamens. The species is only known from two state forests near Dubbo.

<i>Zieria littoralis</i> Species of flowering plant

Zieria littoralis, commonly known as dwarf zieria is a plant in the citrus family Rutaceae and is endemic to south-eastern Australia. It is an erect or spreading shrub with velvety, three-part, clover-like leaves and clusters of up to thirty white or pale pink flowers with four petals and four stamens. It grows on exposed, rocky coastal headlands.

<i>Zieria odorifera</i> Species of flowering plant

Zieria odorifera, commonly known as the fragrant zieria, is a plant in the citrus family Rutaceae and is endemic to inland New South Wales. It is an aromatic shrub with ridged branches, leaves composed of three leaflets and groups of mostly three pale to deep pink, four-petalled flowers in spring.

<i>Zieria parrisiae</i> Species of plant

Zieria parrisiae, commonly known as Parris' zieria, is a plant in the citrus family Rutaceae and is endemic to a small area near Pambula on the south coast of New South Wales. It is a bushy shrub with warty, clover-like leaves composed of three leaflets and in spring there are clusters of up to 24 white to pale yellow flowers with four petals, near the ends of the branches.

<i>Zieria pilosa</i> Species of shrub

Zieria pilosa, commonly known as hairy zieria, is a plant in the citrus family Rutaceae and is endemic to coastal New South Wales. It is a shrub with hairy branches, leaves composed of three leaflets and usually only single white to pale pink flowers in the leaf axils.

Zieria robusta, commonly known as round-leafed zieria, is a plant in the citrus family Rutaceae and is endemic to eastern Australia. It is an erect, bushy shrub with leaves composed of three leaflets which are egg-shaped with the narrower end towards the base. The flowers are pink to white and arranged in groups of up to nine and have four petals and four stamens.

Zieria whitei is a plant in the citrus family Rutaceae and is endemic to a small area of north Queensland. It is a dense, compact shrub with erect wiry branches, three-part leaves and groups of up to three white to pale pink flowers with four petals and four stamens. It is only known from two populations.

References

  1. 1 2 "Zieria obcordata". APNI. Retrieved 5 August 2017.
  2. Armstrong, James; Harden, Gwen. "Zieria obcordata". Royal Botanic Garden Sydney; plantnet. Retrieved 5 August 2017.
  3. 1 2 "Zieria obcordata recovery plan" (PDF). Australian Government Department of the Environment. Retrieved 5 August 2017.
  4. Field, Barron (ed.); Cunningham, Allan (1825). Geographical Memoirs on New South Wales (Chapter 14). London: John Murray. p. 330. Retrieved 5 August 2017.CS1 maint: extra text: authors list (link)
  5. 1 2 Brown, Roland Wilbur (1956). The Composition of Scientific Words. Washington, D.C.: Smithsonian Institution Press.