Ricinocarpos trichophorus

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Ricinocarpos trichophorus
Status DECF R.svg
Declared rare  (DEC)
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Malpighiales
Family: Euphorbiaceae
Genus: Ricinocarpos
Species:
R. trichophorus
Binomial name
Ricinocarpos trichophorus
Synonyms [1]
  • Ricinocarpus trichophorusMüll.Arg. orth. var.
  • Ricinocarpus trichoporusF.Muell. orth. var.
  • Roeperia trichophora(Müll.Arg.) Kuntze

Ricinocarpos trichophorus is a species of flowering plant in the family Euphorbiaceae and is endemic to the south coast of Western Australia. It is an erect, openly branched, monoecious shrub with linear to narrowly oblong leaves, and white flowers in a raceme with two female flowers and up to five male flowers.

Contents

Description

Ricinocarpos trichophorus is an erect, openly branched, monoecious shrub that typically grows to a height of up to 1.8 m (5 ft 11 in), its young branchlets densely covered with greyish-white, star-shaped hairs. The leaves are linear to narrowly oblong, 25–60 mm (0.98–2.36 in) long, 1.5–4.5 mm (0.059–0.177 in) wide with the edges curved under, and sessile or on a short petiole. The upper surface of the leaves is soon glabrous and the lower surface is not visible, apart from the midrib. The flowers are arranged on the ends of branchlets in a raceme with two female flowers at the base and up to five male flowers above them. Each flower has 5 sepals joined at the base and 5 white petals twice as long as the sepals. Male flowers are on a slender pedicel 5–10 mm (0.20–0.39 in) long, the sepal lobes 4.0–5.5 mm (0.16–0.22 in) long and 1.5–2.5 mm (0.059–0.098 in) wide. The petals of male flowers are 8–10 mm (0.31–0.39 in) long and 3.5–5.0 mm (0.14–0.20 in) wide and there are 50 to 60 stamens in a central column. Female flowers are on a stout pedicel 4–10 mm (0.16–0.39 in) long, the sepal lobes 4–7 mm (0.16–0.28 in) long and 1.5–2.5 mm (0.059–0.098 in) wide, the petals 8–9 mm (0.31–0.35 in) long and 1.5–2.5 mm (0.059–0.098 in) wide. Flowering has been observed in January, March and May and from August to November, and the fruit is an elliptic capsule, 8–10 mm (0.31–0.39 in) long and 7–10 mm (0.28–0.39 in) wide. [2] [3]

Taxonomy and naming

Ricinocarpos trichophorus was first formally described in 1864 by Johannes Müller Argoviensis in the journal Linnaea , from specimens collected near the Swan River by James Drummond. [4] [5] The specific epithet (trichophorus) means "bearing hairs". [6]

Distribution and habitat

This species grows in shrubland between sandstone and granite boulders from near the Fitzgerald River and south-west of Ravensthorpe, and north east of Esperance, in the Esperance Plains and Mallee bioregions of southern Western Australia. [2] [3]

Conservation status

Ricinocarpos trichophorus is listed as "Threatened" by the Western Australian Government Department of Biodiversity, Conservation and Attractions, [3] meaning that it is in danger of extinction. [7]

Related Research Articles

Ricinocarpos brevis is a species of flowering plant in the family Euphorbiaceae and is endemic to inland Western Australia. It is a monoecious, densely-branched shrub with narrowly oblong leaves and male and female flowers arranged singly or in small groups.

<i>Ricinocarpos caniana</i> Species of shrub

Ricinocarpos caniana is a species of flowering plant in the family Euphorbiaceae and is endemic to a restricted area of south-eastern Queensland. It is an erect monoecious or dioecious shrub with linear leaves and white flowers, arranged either singly, with two to five male flowers, or a single female flower surrounded by up to four male flowers.

Ricinocarpos crispatus is a species of flowering plant in the family Euphorbiaceae and is endemic to south-western Queensland. It is a monoecious or dioecious shrub with linear leaves and white flowers, arranged either singly, with two to four male flowers, or a single female flower surrounded by one or two male flowers.

<i>Ricinocarpos cyanescens</i> Species of shrub

Ricinocarpos cyanescens is a species of flowering plant in the family Euphorbiaceae and is endemic to the south-west of Western Australia. It is a compact, monoecious shrub with narrowly oblong leaves and male and female flowers arranged singly or in small groups.

<i>Ricinocarpos glaucus</i> Species of shrub

Ricinocarpos glaucus is a species of flowering plant in the family Euphorbiaceae and is endemic to the south-west of Western Australia. It is an erect, monoecious or dioecious shrub with linear or narrowly oblong leaves and male and female flowers arranged singly or in small groups.

Ricinocarpos graniticus is a species of flowering plant in the family Euphorbiaceae and is endemic to the southwest of Western Australia. It is a monoecious shrub with linear leaves and creamy white flowers, arranged either singly, or with a single female flower surrounded by one or two male flowers.

<i>Ricinocarpos linearifolius</i> Species of shrub

Ricinocarpos linearifolius is a species of flowering plant in the family Euphorbiaceae and is endemic to eastern Australia. It is a monoecious or dioecious shrub with hairy young branchlets, linear leaves and white flowers, arranged either singly, with two to four male flowers, or a single female flower surrounded by up to three male flowers.

Ricinocarpos marginatus is a species of flowering plant in the family Euphorbiaceae and is endemic to the north-west of Western Australia. It is an erect, monoecious shrub with narrowly elliptic leaves and white flowers arranged in groups of male flowers, or up to three female flowers surrounded by many male flowers.

<i>Ricinocarpos megalocarpus</i> Species of shrub

Ricinocarpos megalocarpus is a species of flowering plant in the family Euphorbiaceae and is endemic to the south coast of Western Australia. It is a compact, rounded, usually monoecious shrub with linear leaves and white flowers, arranged either singly, or male flowers in groups, or with a single female flower surrounded by up to six male flowers.

<i>Ricinocarpos muricatus</i> Species of shrub

Ricinocarpos muricatus is a species of flowering plant in the family Euphorbiaceae and is endemic to the south-west of Western Australia. It is an erect to spreading, sticky, monoecious shrub with linear leaves and yellow flowers arranged in a raceme, with one or two female flowers surrounded by 8 to 12 male flowers.

Ricinocarpos oliganthus is a species of flowering plant in the family Euphorbiaceae and is endemic to a small area in the south-west of Western Australia. It is a monoecious shrub with linear to narrowly oblong leaves and white to creamy white flowers arranged singly on the ends of branchlets.

Ricinocarpos pilifer is a species of flowering plant in the family Euphorbiaceae and is endemic to a small area in the south-west of Western Australia. It is a compact monoecious shrub with narrowly oblong leaves and creamy white flowers arranged singly, or with two to four male flowers, or a single female flower with one or two male flowers.

<i>Ricinocarpos psilocladus</i> Species of shrub

Ricinocarpos psilocladus is a species of flowering plant in the family Euphorbiaceae and is endemic to the west coast of Western Australia. It is an erect, open, monoecious or dioecious shrub with linear to narrowly oblong or narrowly egg-shaped leaves, and white or yellow flowers arranged singly, or with two to five male flowers, or a single female flower surrounded by up to three male flowers.

Ricinocarpos rosmarinifolius is a species of flowering plant in the family Euphorbiaceae and is endemic to the Kimberley of northern Western Australia. It is an erect, slender monoecious shrub with linear leaves and inconspicuous white flowers arranged singly, or with two to four male flowers, or a single female flower surrounded by up to four male flowers.

Ricinocarpos ruminatus is a species of flowering plant in the family Euphorbiaceae and is endemic to the Expedition Range in central Queensland. It is an erect, monoecious shrub with linear leaves and white flowers, arranged on the ends of branches with 2 to 5 male flowers, or a female flower surrounded by up to 4 male flowers.

Ricinocarpos speciosus is a species of flowering plant in the family Euphorbiaceae and is endemic to eastern Australia. It is a slender, erect, open monoecious or dioeciuos shrub with narrowly elliptic or narrowly oblong leaves and white flowers arranged with two or more male flowers, or with one to four female flowers surrounded by up to four male flowers.

Ricinocarpos stylosus is a species of flowering plant in the family Euphorbiaceae and is endemic to the Norseman district of Western Australia. It is an spreading, rounded, monoecious or dioeceous shrub or small tree, with linear to narrowly oblong leaves and female flowers arranged singly, or with two to five male flowers, or a single female flower surrounded by up to four male flowers.

<i>Ricinocarpos trachyphyllus</i> Species of shrub

Ricinocarpos trachyphyllus is a species of flowering plant in the family Euphorbiaceae and is endemic to eastern Australia. It is an monoecious or dioecious shrub with linear leaves and white flowers, arranged either singly, or with 3 male flowers, or one female flower surrounded by three male flowers.

Ricinocarpos trichophyllus is a species of flowering plant in the family Euphorbiaceae and is endemic to north-western Australia. It is an open, slender, monoecious shrub with linear to narrowly oblong leaves, and flowers in a raceme with one female flower surrounded by two or three male flowers.

<i>Ricinocarpos tuberculatus</i> Species of shrub

Ricinocarpos tuberculatus is a species of flowering plant in the family Euphorbiaceae and is endemic to the south-west of Western Australia. It is an erect, monoecious or dioecious shrub or small tree with linear leaves, and white flowers in a umbel with either 2 to 7 male flowers or a single female flower surrounded by up to 5 male flowers.

References

  1. 1 2 "Ricinocarpos trichophorus". Australian Plant Census. Retrieved 1 November 2023.
  2. 1 2 Halford, David A.; Henderson, Rodney J.F. (2007). "A taxonomic revision of Ricinocarpos Desf. (Euphorbiaceae: Ricinocarpeae, Ricinocarpinae)". Austrobaileya. 7 (3): 430–432. Retrieved 1 November 2023.
  3. 1 2 3 "Ricinocarpos trichophorus". FloraBase . Western Australian Government Department of Biodiversity, Conservation and Attractions.
  4. ↑ "Ricinocarpos trichophorus". Australian Plant Name Index. Retrieved 1 November 2023.
  5. ↑ Argoviensis, Johannes Müller (1866). "Euphorbiaceae". Linnaea: ein Journal für die Botanik in ihrem ganzen Umfange, oder Beiträge zur Pflanzenkunde. 34: 60–61. Retrieved 1 November 2023.
  6. ↑ Sharr, Francis Aubi; George, Alex (2019). Western Australian Plant Names and Their Meanings (3rd ed.). Kardinya, WA: Four Gables Press. p. 327. ISBN   9780958034180.
  7. ↑ "Conservation codes for Western Australian Flora and Fauna" (PDF). Government of Western Australia Department of Parks and Wildlife. Retrieved 1 November 2023.
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