Ricinocarpos trichophyllus

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Ricinocarpos trichophyllus
Status DECF P1.svg
Priority One — Poorly Known Taxa (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. trichophyllus
Binomial name
Ricinocarpos trichophyllus

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.

Contents

Description

Ricinocarpos trichophyllus is an open, slender, monoecious shrub that typically grows to a height of 0.7–1.5 m (2 ft 4 in – 4 ft 11 in), its young branchlets covered with white, star-shaped hairs. The leaves are linear to narrowly oblong, 22–45 mm (0.87–1.77 in) long, 1.4–3.5 mm (0.055–0.138 in) wide with the edges turned down or rolled under on a short petiole. Both surfaces of the leaves are sometimes densely covered with soft hairs. The flowers are arranged on the ends of branchlets with one female flowers surrounded by two or three male flowers. Each flower has 5 sepals joined at the base and 5 petals twice as long as the sepals, but the colour of the flowers has not been observed. Male flowers are on a slender pedicel 2.5–10 mm (0.098–0.394 in) long, the sepal lobes 3.0–3.5 mm (0.12–0.14 in) long and 2.0–2.5 mm (0.079–0.098 in) wide. The petals of male flowers are 1.9–3 mm (0.075–0.118 in) long and 1.2–2.2 mm (0.047–0.087 in) wide and there are about 25 stamens. Female flowers are on a stout pedicel 4–7 mm (0.16–0.28 in) long, the sepal lobes 2.7–3 mm (0.11–0.12 in) long and 2.2–2.6 mm (0.087–0.102 in) wide, the petals 2.3–2.5 mm (0.091–0.098 in) long and 1.0–1.3 mm (0.039–0.051 in) wide. Flowering has been observed in February, May and August, and the fruit is a more or less spherical capsule, 6–8 mm (0.24–0.31 in) long and 7.5–10 mm (0.30–0.39 in) wide. [2] [3]

Taxonomy and naming

Ricinocarpos trichophyllus was first formally described in 2007 by David Halford and Rodney John Francis Henderson in the journal Austrobaileya , from specimens collected near Nancy's Gorge in the Spirit Hills Conservation Area in the Victoria River region of the Northern Territory in 1996. [2] [4] The specific epithet (trichophyllus) means "hairy leaved". [2]

Distribution and habitat

This species grows in shrubland and woodland in the Drysdale River National Park in the Kimberley region of Western Australia and in the Moyle and Victoria River regions of the Northern Territory. [2] [3] [5]

Conservation status

Ricinocarpos trichophyllus is listed as "Priority One" by the Government of Western Australia Department of Biodiversity, Conservation and Attractions, [3] meaning that it is known from only one or a few locations which are potentially at risk. [6]

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 gloria-medii</i> Species of shrub

Ricinocarpos gloria-medii is a species of flowering plant in the family Euphorbiaceae and is endemic to the Northern Territory of Australia. It is a spreading, monoecious or dioecious shrub with linear 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.

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 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 a 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 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.

<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.

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

Ricinocarpos undulatus, commonly known as wedding bush, 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 leaves, and white flowers in a umbel with either a single male or female flower, 2 to 5 male flowers, or a single female flower surrounded by up to 3 male flowers.

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

Ricinocarpos velutinus is a species of flowering plant in the family Euphorbiaceae and is endemic to the south-west of Western Australia. It is an erect, rounded, usually monoecious shrub with linear leaves, and yellow flowers with either all female or all male flowers, or one or two female flowers with up to 13 male flowers below them.

References

  1. ↑ "Ricinocarpos trichophyllus". Australian Plant Census. Retrieved 4 November 2023.
  2. 1 2 3 4 Halford, David A.; Henderson, Rodney J.F. (2007). "A taxonomic revision of Ricinocarpos Desf. (Euphorbiaceae: Ricinocarpeae, Ricinocarpinae)". Austrobaileya. 7 (3): 432–434. Retrieved 1 November 2023.
  3. 1 2 3 "Ricinocarpos trichophorus". FloraBase . Western Australian Government Department of Biodiversity, Conservation and Attractions.
  4. ↑ "Ricinocarpos trichophyllus". Australian Plant Name Index. Retrieved 4 November 2023.
  5. ↑ "Ricinocarpos trichophyllus". Northern Territory Government. Retrieved 4 November 2023.
  6. ↑ "Conservation codes for Western Australian Flora and Fauna" (PDF). Government of Western Australia Department of Parks and Wildlife. Retrieved 4 November 2023.
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