Hibbertia extrorsa

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

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.

Contents

Description

Hibbertia extrorsa is a spreading shrublet that typically grows to a height of 40 cm (16 in) with its foliage covered with rosette-like hairs. The leaves are linear to elliptic, 9–18 mm (0.35–0.71 in) long and 1–2.5 mm (0.039–0.098 in) wide on an indistinct petiole up to 1.4 mm (0.055 in) long. The flowers are arranged singly or in pairs in leaf axils on a thin peduncle 1.3–3.4 mm (0.051–0.134 in) long, with a lance-shaped bract 1.9–2.3 mm (0.075–0.091 in) long. The five sepals are joined at the base, the two outer sepal lobes 3.1–3.5 mm (0.12–0.14 in) long and the inner lobes slightly shorter. The five petals are wedge-shaped, yellow, 2.8–3.4 mm (0.11–0.13 in) long and there are about thirty stamens arranged in groups around the two, sometimes three carpels, each carpel with two or three ovules. Flowering has been observed in March and April. [2] [3]

Taxonomy

Hibbertia extrorsa was first formally described in 2010 by Hellmut R. Toelken in the Journal of the Adelaide Botanic Gardens from specimens collected in 1990. [2] [4] The specific epithet (extrorsa) means "turned away from the centre" and refers to the curved sepal lobes. [2]

Distribution and habitat

This hibbertia grows in sand on sandstone in woodland in a small area of Arnhem Land in the Northern Territory. [2]

Conservation status

Goodenia extrorsa is classified as "near threatened" under the Territory Parks and Wildlife Conservation Act 1976 . [3]

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.

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 brevipedunculata is a species of flowering plant in the family Dilleniaceae and is endemic to northern Australia. It is a sub-shrub with hairy foliage, linear to lance-shaped leaves with the narrow end towards the base, and yellow flowers arranged singly on the ends of branches or short side shoots, with thirty to forty-four stamens arranged in bundles 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 caudice is a species of flowering plant in the family Dilleniaceae and is endemic to northern Australia. It is a shrub with wiry stems, hairy foliage, elliptic to lance-shaped leaves with the narrower end towards the base, and yellow flowers arranged in leaf axils, mostly with twenty-four to twenty-six stamens arranged in groups around the two carpels.

Hibbertia ciliolata is a species of flowering plant in the family Dilleniaceae and is endemic to the northern part of the Northern Territory. It is a shrub with a single stem, hairy foliage, linear to elliptic leaves, and yellow flowers arranged in leaf axils, mostly with eighteen to twenty-six 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 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 malacophylla is a species of flowering plant in the family Dilleniaceae and is endemic to Queensland. It is a spreading shrub with densely hairy foliage, elliptic leaves, and single yellow flowers arranged in leaf axils with 50 to 55 stamens arranged 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 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 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 solanifolia is a species of flowering plant in the family Dilleniaceae and is endemic to the Top End of the Northern Territory in Australia. It is a spreading to low-lying shrub with ridged branches, elliptic leaves and yellow flowers usually arranged singly in leaf axils, with 34 to 38 stamens arranged in groups around three 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.

References

  1. "Hibbertia extrorsa". Australian Plant Census. Retrieved 7 June 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: 88–90. Retrieved 7 June 2021.
  3. 1 2 "Hibbertia extrorsa". efloraNT. Retrieved 7 June 2021.
  4. "Hibbertia extrorsa". APNI. Retrieved 7 June 2021.