Hibbertia tricornis

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Hibbertia tricornis
Scientific classification Red Pencil Icon.png
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Order: Dilleniales
Family: Dilleniaceae
Genus: Hibbertia
Species:
H. tricornis
Binomial name
Hibbertia tricornis

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.

Contents

Description

Hibbertia tricornis is a more or less prostrate shrublet that typically grows to a height of up to 20 cm (7.9 in) and has a few delicate, wiry branches, and foliage covered with rosette-like hairs. The leaves are elliptic, mostly 5.5–15 mm (0.22–0.59 in) long and 5–10 mm (0.20–0.39 in) wide on a petiole 0.7–2.2 mm (0.028–0.087 in) long. The flowers are arranged singly in leaf axils on a thread-like peduncle 4.5–10 mm (0.18–0.39 in) long, with elliptic bracts 2.6–3.5 mm (0.10–0.14 in) long at the base. The five sepals are joined at the base, the two outer sepal lobes 3.5–3.8 mm (0.14–0.15 in) long and about 1 mm (0.039 in) wide, and the inner lobes about 2.5 mm (0.098 in) wide. The five petals are wedge-shaped, yellow, 7.6–8.9 mm (0.30–0.35 in) long with a deep notch at the tip and there are 19 to 24 stamens arranged around the two densely scaly carpels, each carpel with two ovules. [2]

Taxonomy

Hibbertia tricornis was first formally described in 2010 by Hellmut R. Toelken in the Journal of the Adelaide Botanic Gardens from a specimen collected by Clyde Robert Dunlop on Mount Brockman on the edge of the Arnhem Land escarpment in 1978. [2] [3] The specific epithet (tricornis) means "three-horned", referring to the bract and outer sepal lobes. [2]

Distribution

This hibbertia is only known from three specimens collected from the type location where they were growing between rocks in woodland. [2]

Conservation status

Hibbertia tricornis is classified as "vulnerable" under the Northern Territory Government Northern Territory Government Territory Parks and Wildlife Conservation Act 1976 . [4]

See also

Related Research Articles

Hibbertia alopecota is a species of flowering plant in the family Dilleniaceae and is endemic to the Northern Territory. It is a low shrub with elliptic to lance-shaped leaves and yellow flowers arranged singly in leaf axils, with sixteen to twenty-four stamens arranged in bundles around two carpels.

Hibbertia auriculiflora is a species of flowering plant in the family Dilleniaceae and is endemic to northern parts of the Northern Territory. It is usually a short-lived perennial shrublet covered with hairs and scales and has mostly oblong to linear leaves. The flowers are usually arranged singly or in groups of two or three in leaf axils, with twenty-five to thirty-two stamens arranged in groups around the two carpels.

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 brennanii is a species of flowering plant in the family Dilleniaceae and is endemic to the Arnhem Land escarpment. It is a low, spreading sub-shrub with hairy foliage, elliptic to lance-shaped leaves and pale yellow flowers arranged singly in leaf axils, with ten to twelve stamens arranged in groups around the two 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 circularis is a species of flowering plant in the family Dilleniaceae and is endemic to the northern part of the Northern Territory. It is a perennial herb with prostrate, trailing branches, elliptic to more or less round leaves, and yellow flowers arranged in leaf axils, with thirty stamens arranged in groups around the two carpels.

Hibbertia demissa is a species of flowering plant in the family Dilleniaceae and is endemic to a restricted area of New South Wales. It is a low-lying shrublet with small elliptic leaves and single yellow flowers arranged on the ends of branchlets, with nine to twelve stamens arranged around 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 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 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 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.

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 persquamata is a species of flowering plant in the family Dilleniaceae and is endemic to the Northern Kimberley region of Western Australia. It is a spreading to prostrate shrub with flattened, scaly branches, narrow elliptic leaves and yellow flowers arranged singly in leaf axils with 20 to 26 stamens arranged around three scaly carpels.

Hibbertia suffrutescens is a species of flowering plant in the family Dilleniaceae and is endemic to the Northern Kimberley region of Western Australia. It is a small shrub with wiry branches, narrowly lance-shaped leaves with the narrower end towards the base, and yellow flowers arranged singly along the branches, with 30 to 36 stamens arranged in groups around two densely scaly carpels.

Hibbertia sulcata is a species of flowering plant in the family Dilleniaceae and is only known from a single specimen collected in Arnhem Land in the Northern Territory. It is a small, sprawling shrub with wiry branches, linear leaves and yellow flowers arranged singly or in pairs in leaf axils with 22 to 24 stamens arranged in groups around two densely scaly carpels.

Hibbertia tridentata is a species of flowering plant in the family Dilleniaceae and is only known from a single population in Arnhem Land in the Northern Territory. It is a shrub with a few wiry branches, egg-shaped to triangular leaves with the narrower end towards the base, and yellow flowers usually arranged singly in leaf axils with eighteen to twenty stamens arranged around two densely scaly carpels.

References

  1. ↑ "Hibbertia tricornis". Australian Plant Census. Retrieved 27 November 2021.
  2. 1 2 3 4 Toelken, Hellmut R. (2010). "Notes on Hibbertia (Dilleniaceae) 5. H. melhanioides and H. tomentosa groups from tropical Australia" (PDF). Journal of the Adelaide Botanic Gardens. 23: 62–64. Retrieved 27 November 2021.
  3. ↑ "Hibbertia tricornis". APNI. Retrieved 27 November 2021.
  4. ↑ "Hibbertia tricornis". Northern Territory Government. Retrieved 27 November 2021.
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