Hibbertia orbicularis

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Hibbertia orbicularis
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Order: Dilleniales
Family: Dilleniaceae
Genus: Hibbertia
Species:
H. orbicularis
Binomial name
Hibbertia orbicularis

Hibbertia oligocarpa is a species of flowering plant in the family Dilleniaceae and is endemic to part of the Arnhem Land plateau in the Northern Territory. It is a shrublet with spreading branches, broadly elliptic to round leaves and yellow flowers with 35 to 40 stamens arranged in groups around two carpels.

Contents

Description

Hibbertia orbicularis is a shrublet that typically grows to a height of 30 cm (12 in) and has reddish, trailing or scrambling stems. The foliage is covered with bundled, rosette-like hairs. The leaves are broadly elliptic to round, 5–8 mm (0.20–0.31 in) long and 3–7.5 mm (0.12–0.30 in) wide on a petiole 0.2–1.5 mm (0.0079–0.0591 in) long. The flowers are arranged singly in leaf axils on a thread-like peduncle 3–6 mm (0.12–0.24 in) long, with lance-shaped to egg-shaped bracts 1.3–1.8 mm (0.051–0.071 in) long at the base. The five sepals are joined at the base, the two outer sepal lobes 2.2–3.3 mm (0.087–0.130 in) long and the three inner lobes 3.1–3.5 mm (0.12–0.14 in) long. The five petals are yellow and wedge- shaped to egg-shaped with the narrower end towards the base, 3.3–4.1 mm (0.13–0.16 in) long with two lobes at the tip. There are 35 to 40 stamens in bundles around the two carpels, each with two ovules. Flowering occurs from January to June. [2] [3]

Taxonomy

Hibbertia orbicularis was first formally described in 2010 by Hellmut R. Toelken in the Journal of the Adelaide Botanic Gardens from specimens collected near the headwater of the East Alligator River by Lyndley Craven and Glenn Wightman. [2] [4] The specific epithet (orbicularis) means "a small circle", referring to the shape of the leaves. [5]

Distribution and habitat

This hibbertia grows on sandstone ledges and slopes in the north-west part of the Arnhem Land plateau in the Northern Territory. [2]

See also

Related Research Articles

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Hibbertia argyrochiton is a species of flowering plant in the family Dilleniaceae and is endemic to northern parts of the Northern Territory. It is a shrub densely covered with scales and has elliptic to lance-shaped leaves, and yellow flowers usually arranged singly in leaf axils, with twenty to twenty-four stamens arranged in groups around the two carpels.

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Hibbertia axillaris is a species of flowering plant in the family Dilleniaceae and is endemic to northern Western Australia. It is usually a multi-stemmed shrublet with ridged branchlets, foliage covered with scales and rosette-like hairs and mostly elliptic to lance-shaped leaves. The flowers are arranged singly in leaf axils, with forty-two to fifty stamens arranged around the three carpels.

Hibbertia cactifolia is a species of flowering plant in the family Dilleniaceae and is endemic to the Arnhem Land escarpment. It is a multi-stemmed shrublet with hairy foliage, oblong to elliptic leaves and yellow flowers arranged singly in leaf axils, with twenty-six to twenty-eight stamens arranged in groups around the two carpels.

Hibbertia echiifolia is a species of flowering plant in the family Dilleniaceae and is endemic to northern Australia. It is a variable shrub with elliptic to lance-shaped or oblong leaves and yellow flowers arranged singly in leaf axils, with twenty-nine to forty-five stamens arranged around the three carpels.

Hibbertia extrorsa is a species of flowering plant in the family Dilleniaceae and is endemic to a restricted part of the Northern Territory. It is a small, spreading shrub with hairy foliage, linear to elliptic leaves, and yellow flowers arranged in leaf axils with about thirty stamens arranged in groups around the two carpels.

Hibbertia fractiflexa is a species of flowering plant in the family Dilleniaceae and is endemic to the Northern Territory. It is a small, multi-stemmed shrub with hairy foliage, elliptic leaves, and yellow flowers arranged in leaf axils with sixteen to twenty-two stamens arranged in groups around the two carpels.

Hibbertia guttata is a species of flowering plant in the family Dilleniaceae and is endemic to the Northern Territory. It is a straggly shrub with moderately to densely hairy foliage, linear to elliptic leaves, and yellow flowers arranged in leaf axils with 28 to 36 stamens arranged in groups around the three carpels.

Hibbertia incompta is a species of flowering plant in the family Dilleniaceae and is endemic to the Northern Territory. It is a weakly stemmed, often prostrate shrublet with hairy foliage, linear to elliptic leaves, and yellow flowers arranged in leaf axils with 45 to 60 stamens arranged in groups around the two or three carpels.

Hibbertia incurvata is a species of flowering plant in the family Dilleniaceae and is endemic to the Northern Territory. It is a spreading, woody shrub with scaly foliage, elliptic to lance-shaped leaves, and yellow flowers arranged in leaf axils with 28 to 35 stamens arranged in bundles around the two carpels.

Hibbertia ligulata is a species of flowering plant in the family Dilleniaceae and is endemic to the Northern Territory. It is a shrublet with hairy, wiry branches, linear leaves, and single yellow flowers arranged in leaf axils with twelve stamens arranged in bundles around the two carpels.

Hibbertia malleolacea is a species of flowering plant in the family Dilleniaceae and is endemic to the northern parts of the Northern Territory. It is a straggly shrub with hairy foliage, elliptic leaves, and yellow flowers arranged in leaf axils with 28 to 32 stamens arranged in bundles around three carpels.

Hibbertia marrawalina is a species of flowering plant in the family Dilleniaceae and is endemic to a restricted part of the Northern Territory. It is a shrublet with scaly foliage, wiry branches, narrow linear leaves, and yellow flowers arranged singly in leaf axils with fifteen to eighteen stamens and about seven staminodes arranged in bundles around two scaly carpels.

Hibbertia oblongata is a species of flowering plant in the family Dilleniaceae and is endemic to northern Australia. It is an erect to spreading shrub with scaly foliage, elliptic to oblong leaves, and yellow flowers usually arranged singly in leaf axils, with 16 to 36 stamens arranged in bundles around the two carpels.

Hibbertia oligocarpa is a species of flowering plant in the family Dilleniaceae and is only known from a single specimen collected near a waterfall near Gunbalanya in the Northern Territory. It is a shrublet with trailing stems, narrow elliptic leaves and yellow flowers with 46 to 58 stamens arranged in groups around four carpels.

Hibbertia pancerea is a species of flowering plant in the family Dilleniaceae and is endemic to Kakadu National Park. It is a spreading shrub foliage densely covered with shield-like scales, that has elliptic leaves and yellow flowers arranged singly in leaf axils with 26 to 30 stamens arranged in bundles around two carpels.

Hibbertia pilulis is a species of flowering plant in the family Dilleniaceae and is endemic to Arnhem Land in the Northern Territory. It is a straggly shrub with hairy foliage, elliptic leaves and yellow flowers arranged singly in leaf axils with 34 to 46 stamens arranged in bundles around two carpels.

Hibbertia tomentosa is a species of flowering plant in the family Dilleniaceae and is endemic to the Northern Territory. It is a small, spreading to low-lying shrub with its foliage covered with rosette-like hairs, and has linear leaves and yellow flowers arranged singly on the ends of short side branches, with fourteen to twenty stamens arranged in bundles around two densely scaly carpels.

Hibbertia tricornis is a species of flowering plant in the family Dilleniaceae and is only known from a three specimens collected in Arnhem Land in the Northern Territory. It is a small, more or less prostrate shrublet with a few delicate, wiry branches, elliptic leaves and yellow flowers arranged singly in leaf axils with 19 to 24 stamens arranged in groups around two densely scaly carpels.

References

  1. ↑ "Hibbertia orbicularis". Australian Plant Census. Archived from the original on 4 August 2021. Retrieved 4 August 2021.
  2. 1 2 3 Toelken, Hellmut R. (2010). "Notes on Hibbertia I. New taxa from south-eastern Australia" (PDF). Journal of the Adelaide Botanic Gardens. 16: 55–56. Archived (PDF) from the original on 1 April 2021. Retrieved 4 August 2021.
  3. ↑ "Hibbertia orbicularis". Northern Territory Government. Archived from the original on 4 August 2021. Retrieved 4 August 2021.
  4. ↑ "Hibbertia orbicularis". APNI. Archived from the original on 23 July 2023. Retrieved 4 August 2021.
  5. ↑ Sharr, Francis Aubi; George, Alex (2019). Western Australian Plant Names and Their Meanings (3rd ed.). Kardinya, WA: Four Gables Press. p. 266. ISBN   9780958034180.
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