Hibbertia obtusifolia

Hoary guinea flower
	In Morton National Park
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Eudicots
Order:	Dilleniales
Family:	Dilleniaceae
Genus:	Hibbertia
Species:	H. obtusifolia
Binomial name
	Hibbertia obtusifolia; DC.
Synonyms
	Hibbertia linearis var. obtusifolia(DC.) A.Gray ; Hibbertia procumbensauct. non (Labill.) DC.: Hooker, J.D. (1855);

Last updated December 31, 2023

Hibbertia obtusifolia, commonly known as hoary guinea flower,^[2] is a species of flowering plant in the family Dilleniaceae and is endemic to south-eastern Australia. It is usually an erect shrub with spreading branches, lance-shaped to egg-shaped leaves with the narrower end towards the base, and yellow flowers with thirty or more stamens arranged around three glabrous carpels.

Description

Hibbertia obtusifolia is an erect shrub with spreading branches up to 60 cm (24 in) long that are hairy when young. The leaves are lance-shaped to egg-shaped leaves with the narrower end towards the base, 6–45 mm (0.24–1.77 in) long and 1.5–14 mm (0.059–0.551 in) wide with a rounded or truncated end. The flowers are arranged on the ends of branches or short side shoots and are sessile with two or three bracts 2.8–3.6 mm (0.11–0.14 in) long at the base. The sepals are 4.8–8.5 mm (0.19–0.33 in) long and of unequal lengths. The petals are mid to pale yellow, egg-shaped with the narrower end towards the base, and 6.6–16 mm (0.26–0.63 in) long. There are thirty or more stamens arranged around three glabrous carpels. Flowering occurs from September to December.^[2]^[3]^[4]

Taxonomy

Hibbertia obtusifolia was first formally described in 1817 by Swiss botanist Augustin Pyramus de Candolle in Regni Vegetabilis Systema Naturale from specimens collected by George Caley.^[5]^[6] The specific epithet (obtusifolia) means "blunt leaved".^[7]

Distribution and habitat

Hoary guinea flower is widespread and locally common in south-east Queensland, all but the far west of New South Wales, the Australian Capital Territory and in mainly eastern Victoria, growing in forest and woodland. There is a single record from Clarke Island in Bass Strait in 1892, but recent surveys have not located the species and it is presumed extinct in that state.^[2]^[3]^[8]

Conservation status

This hibbertia is presumed extinct in Tasmania under the Tasmanian Government Threatened Species Protection Act 1995 .^[8]

Related Research Articles

Hibbertia sericea, commonly known as silky guinea-flower, is a species of flowering plant in the family Dilleniaceae and is endemic to south-eastern Australia. It is an erect or spreading shrub with softly-hairy branches, elliptic to egg-shaped leaves with the narrower end towards the base, and yellow flowers with eight to fourteen stamens in a cluster on one side of two hairy carpels.

Hibbertia pedunculata, commonly known as stalked guinea-flower, is a species of flowering plant in the family Dilleniaceae and is endemic to New South Wales. It is a diffuse, prostrate or erect shrub with linear leaves and yellow flowers borne on a relatively long peduncle, the flowers with fifteen to twenty stamens arranged around two hairy carpels.

Hibbertia fasciculata is a species of flowering plant in the family Dilleniaceae and is endemic to south-eastern Australia. It is a small erect to spreading shrub with glabrous stems except on new growth, narrow linear leaves, and yellow flowers arranged in leaf axils, with eight to twelve stamens surrounding three carpels.

Hibbertia hermanniifolia is a species of flowering plant in the family Dilleniaceae and is endemic to eastern Australia. It is an erect shrub with spatula-shaped to wedge-shaped leaves and yellow flowers arranged singly in leaf axils, with ten to fifteen stamens arranged around two hairy carpels.

Hibbertia serpyllifolia is a species of flowering plant in the family Dilleniaceae and is endemic to Queensland. It is a small, spreading to low-lying shrub with many stems, oblong leaves and single yellow flowers on the ends of branches, with twelve to twenty stamens in groups around three hairy carpels.

Hibbertia saligna is a species of flowering plant in the family Dilleniaceae and is endemic to the east coast of New South Wales. It is an erect or spreading shrub with narrow elliptic to lance-shaped leaves with the narrower end towards the base and relatively large yellow flowers with 20 to 35 stamens arranged around three glabrous carpels.

Hibbertia bracteata is a species of flowering plant, in the family Dilleniaceae, and is endemic to eastern New South Wales. It is a shrub with lance-shaped to oblong leaves and yellow flowers with about sixteen stamens arranged on one side of the two carpels.

Hibbertia diffusa, commonly known as wedge guinea flower, is a species of flowering plant in the family Dilleniaceae and is endemic to south-eastern Australia. It is a prostrate to low-lying shrub with glabrous stems, egg-shaped to lance-shaped leaves with the narrower end towards the base, and bright yellow flowers arranged on the ends of branchlets, with twenty to twenty-five stamens arranged around two or three carpels.

Hibbertia banksii is a species of flowering plant in the family Dilleniaceae and is native to Queensland and New Guinea. It is a shrub with thick, leathery leaves and yellow flowers with about twenty to forty-eight stamens arranged on one side of the two carpels.

Hibbertia cinerea is a species of flowering plant in the family Dilleniaceae and is endemic to the southern part of the Eyre Peninsula in South Australia. It is a densely-branched, hairy shrub with narrow elliptic to lance-shaped leaves, and yellow flowers arranged on the ends of branchlet, with nine to twelve stamens arranged in a group on one side of the two carpels.

Hibbertia cistifolia is a species of flowering plant in the family Dilleniaceae and is endemic to northern Australia. It is a prostrate to low-lying sub-shrub with trailing, wiry stems, hairy foliage, oblong to elliptic leaves and yellow flowers arranged in leaf axils, with forty to fifty-eight stamens arranged around the two carpels.

Hibbertia furfuracea is a species of flowering plant in the family Dilleniaceae and is endemic to near-coastal areas of south-western Western Australia. It is an erect shrub with narrow egg-shaped leaves with the narrower end towards the base, and yellow flowers borne in upper leaf axils, with ten to twelve stamens all on one side of two carpels.

Hibbertia intermedia is a species of flowering plant in the family Dilleniaceae and is endemic to New South Wales. It is a small shrublet with linear to narrow oblong leaves and yellow flowers usually with seven to nine stamens arranged in a single cluster.

Hibbertia lepidota is a species of flowering plant in the family Dilleniaceae and is endemic to northern Australia. It is an erect or trailing shrub with scaly foliage, mostly linear to elliptic leaves, and yellow flowers arranged singly or on small groups in leaf axils, with 15 to 24 stamens arranged in bundles around the two carpels.

Hibbertia linearis is a species of flowering plant in the family Dilleniaceae and is endemic to eastern Australia. It is a shrub with linear to oblong or egg-shaped leaves and yellow flowers with 15 to 25 stamens arranged around the three carpels.

Hibbertia monogyna is a species of flowering plant in the family Dilleniaceae and is endemic to south-eastern Australia. It is an erect, mostly glabrous shrub with linear to wedge-shaped or spatula-shaped leaves and yellow flowers with ten to twelve stamens arranged around a single glabrous carpel.

Hibbertia nitida is a species of flowering plant in the family Dilleniaceae and is endemic to the Central Coast of New South Wales. It is an erect shrub with lance-shaped leaves with the narrower end towards the base and yellow flowers with about eleven stamens arranged on one side of two silky-hairy carpels.

Hibbertia procumbens, commonly known as spreading guinea flower, is a species of flowering plant in the family Dilleniaceae and is endemic to south-eastern Australia. It is a prostrate, often mat-forming shrub with more or less glabrous stems, linear to narrow lance-shaped leaves with the narrower end towards the base, and yellow flowers with eighteen to twenty-five stamens arranged in groups around usually four glabrous 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 virgata, commonly known as twiggy guinea flower, is a species of flowering plant in the family Dilleniaceae and is endemic to south-eastern Australia. It is an erect shrub with linear leaves and yellow flowers with ten to twelve stamens arranged around three glabrous carpels.

References

1 2 "Hibbertia obtusifolia". Australian Plant Census. Retrieved 31 July 2021.
1 2 3 "Hibbertia obtusifolia". Royal Botanic Garden Sydney. Retrieved 31 July 2021.
1 2 Toelken, Hellmut R. "Hibbertia obtusifolia". Royal Btanic Gardens Victoria. Retrieved 31 July 2021.
↑ Wood, Betty. "Hibbertia obtusifolia" (PDF). Lucid Keys. Retrieved 31 July 2021.
↑ "Hibbertia obtusifolia". APNI. Retrieved 31 July 2021.
↑ de Candolle, Augustin P. (1817). Regni Vegetabilis Systema Naturale. Paris. p. 429. Retrieved 31 July 2021.
↑ Sharr, Francis Aubi; George, Alex (2019). Western Australian Plant Names and Their Meanings (3rd ed.). Kardinya, WA: Four Gables Press. p. 263. ISBN 9780958034180.
1 2 "Hibbertia obtusifolia". Tasmanian Government Department of Primary Industries, Parks, Water and Environment. Retrieved 31 July 2021.

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[APC-1] 1 2 "Hibbertia obtusifolia". Australian Plant Census. Retrieved 31 July 2021.

[RBGS-2] 1 2 3 "Hibbertia obtusifolia". Royal Botanic Garden Sydney. Retrieved 31 July 2021.

[RBGV-3] 1 2 Toelken, Hellmut R. "Hibbertia obtusifolia". Royal Btanic Gardens Victoria. Retrieved 31 July 2021.

[lucid-4] Wood, Betty. "Hibbertia obtusifolia" (PDF). Lucid Keys. Retrieved 31 July 2021.

[APN-5] "Hibbertia obtusifolia". APNI. Retrieved 31 July 2021.

[DC.-6] Candolle, Augustin P. (1817). Regni Vegetabilis Systema Naturale. Paris. p. 429. Retrieved 31 July 2021.

[Sharr-7] Sharr, Francis Aubi; George, Alex (2019). Western Australian Plant Names and Their Meanings (3rd ed.). Kardinya, WA: Four Gables Press. p. 263. ISBN 9780958034180.

[dpipwe-8] 1 2 "Hibbertia obtusifolia". Tasmanian Government Department of Primary Industries, Parks, Water and Environment. Retrieved 31 July 2021.

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