Hibbertia pilulis

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

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.

Contents

Description

Hibbertia pilulis is a straggly shrub that typically grows to a height of up to 2 m (6 ft 7 in) with hairy foliage. The leaves are elliptic, mostly 10–30 mm (0.39–1.18 in) long and 0.8–1.8 mm (0.031–0.071 in) wide with the edges rolled under, on a petiole 0.2–0.6 mm (0.0079–0.0236 in) long. The flowers are arranged on the ends of the branches, each flower on a thread-like peduncle 14.3–43.2 mm (0.56–1.70 in) long, with linear bracts 1.3–1.6 mm (0.051–0.063 in) long at the base. The five sepals are joined at the base, the two outer sepal lobes 2.6–2.9 mm (0.10–0.11 in) wide and the inner lobes 4.6–5.1 mm (0.18–0.20 in) wide. The five petals are broadly egg-shaped with the narrower end towards the base, yellow, 9.5–11.7 mm (0.37–0.46 in) long and there are 34 to 46 stamens arranged in bundles around the two carpels, each carpel with two ovules. Flowering occurs from December to June. [2]

Taxonomy

Hibbertia pilulis was first formally described in 2010 by Hellmut R. Toelken in the Journal of the Adelaide Botanic Gardens from specimens collected by Clyde Dunlop in 1980 in Deaf Adder Gorge. [2] [3] The specific epithet (pilulis) means "small balls", referring to the small spherical flower buds on long peduncles. [2]

Distribution and habitat

This hibbertia grows in scrub vegetation on top of the Arnhem Land Sandstone Plateau in the northern part of the Northern Territory. [2] [4]

Conservation status

Hibbertia pilulis is classified as of "least concern" under the Territory Parks and Wildlife Conservation Act 1976 . [4]

See also

Related Research Articles

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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 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 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 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 mollis is a species of flowering plant in the family Dilleniaceae and is endemic to a restricted part of Western Australia. It is a shrub with hairy, ridged branches, narrow elliptic-oblong leaves, and yellow flowers arranged singly in leaf axils with about twenty-four stamens arranged in bundles around two densely 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 Oenpelli 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 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 rufociliata is a species of flowering plant in the family Dilleniaceae and is endemic to a restricted area of north Queensland. It is a shrub with hairy foliage, elliptic to lance-shaped leaves with the narrower end towards the base, and yellow flowers usually arranged singly in leaf axils with 36 to 44 stamens arranged in bundles around two densely scaly carpels.

Hibbertia scabra is a species of flowering plant in the family Dilleniaceae and is endemic to the north of the Northern Territory. It is a small shrub with hairy foliage, linear to narrow elliptical leaves and yellow flowers arranged singly near the ends of branches with about fifty stamens arranged 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.

References

  1. ↑ "Hibbertia pilulis". Australian Plant Census. Retrieved 19 August 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: 95–96. Retrieved 19 August 2021.
  3. ↑ "Hibbertia pilulis". APNI. Retrieved 19 August 2021.
  4. 1 2 "Hibbertia pilulis". Northern Territory Government. Retrieved 12 August 2021.
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