Ricinocarpos psilocladus

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Ricinocarpos psilocladus
Ricinocarpos psilocladus.jpg
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. psilocladus
Binomial name
Ricinocarpos psilocladus
Synonyms [1]
  • Bertya gummifera var. psilocladaMüll.Arg.
  • Bertya psiloclada(Müll.Arg.) Baill. nom. inval.
  • Ricinocarpus psilocladusBenth. orth. var.
  • Roeperia psiloclada(Müll.Arg.) Kuntze

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.

Contents

Description

Ricinocarpos psilocladus is an erect, open, monoecious or dioecious shrub that typically grows to height of up to 1.8 m (5 ft 11 in), its young branchlets reddish and sticky. The leaves are linear to narrowly oblong or narrowly egg-shaped, 20–40 mm (0.79–1.57 in) long and 2.5–7 mm (0.098–0.276 in) wide on a petiole 1.5–3 mm (0.059–0.118 in) long. The upper surface of the leaves is glabrous and the lower surface is covered with soft, woolly white hairs. The flowers are arranged on the ends of branchlets either singly, with two to five male flowers, or a single female flower surrounded by up to three male flowers. Each flower has 5 sepals joined at the base and 5 white or yellow petals. Male flowers are on a slender pedicel 5–16 mm (0.20–0.63 in) long, the sepal lobes 3–4 mm (0.12–0.16 in) long and 2.0–2.5 mm (0.079–0.098 in) wide. The petals of male flowers are 6–9 mm (0.24–0.35 in) long and 3.5–4.0 mm (0.14–0.16 in) wide and there are 40 to 50 stamens in a central column 2–3 mm (0.079–0.118 in) long. Female flowers are on a stout pedicel 6–15 mm (0.24–0.59 in) long, the sepal lobes 3.4–4.0 mm (0.13–0.16 in) long and 1.8–2.1 mm (0.071–0.083 in) wide, the petals 7.0–8.5 mm (0.28–0.33 in) long and 2.5–4.5 mm (0.098–0.177 in) wide. Flowering has been observed from May to September, and the fruit is an elliptic capsule, 5–7 mm (0.20–0.28 in) long and 6–7 mm (0.24–0.28 in) wide. [2] [3]

Taxonomy and naming

This species was first formally described in 1864 by 2007 by Johannes Müller Argoviensis, who gave it the name Bertya gummifera var. psiloclada, in Flora: oder Allgemeine Botanischer Zeitung from specimens collected near the Swan River by James Drummond. [4] [5] In 1873, George Bentham raised the variety to species status as Ricinocarpos psilocladus in Flora Australiensis . [6] The specific epithet (psilocladus) means "glabrous shoot", referring to the pedicels which lack bracts at flowering time. [7]

Distribution and habitat

Ricinocarpos psilocladus grows in heath and shrubland, mainly in near-coastal areas between Geraldton and Northampton in the Avon Wheatbelt and Geraldton Sandplains bioregions of Western Australia. [2] [3]

Conservation status

Ricinocarpos psilocladus is listed as "not threatened" by the Western Australian Government Department of Biodiversity, Conservation and Attractions. [3]

Related Research Articles

<i>Bertya</i> Genus of flowering plants

Bertya is a genus of plants in the family Euphorbiaceae first described as a genus in 1845. The entire genus is endemic to Australia.

<i>Ricinocarpos</i> Genus of flowering plants

Ricinocarpos is a genus of evergreen flowering plants in the family Euphorbiaceae and is endemic to Australia. Plants in the genus Ricinocarpos are monoecious shrubs with leaves arranged alternately along the branches, the edges curved downwards or rolled under. Male flowers are arranged singly or in racemes at the ends of branchlets, with four to six sepals that are fused at the base. There are four to six petals that are longer than the sepals, with many stamens fused to form a central column. Female flowers are arranged singly and are similar to male flowers but with three styles fused at the base and with a deeply branched tip. The fruit is a capsule containing seeds with an elaiosome.

<i>Leucopogon inflexus</i> Species of flowering plant

Leucopogon inflexus is a species of flowering plant in the heath family Ericaceae and is endemic to the south-west of Western Australia. It is an erect, open shrub with more or less glabrous young branchlets, spirally arranged, erect, egg-shaped to more or less round leaves, and white, bell-shaped, densely bearded flowers.

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.

<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 ledifolius</i> Species of shrub

Ricinocarpos ledifolius is a species of flowering plant in the family Euphorbiaceae and is endemic to eastern Queensland. It is a monoecious or dioecious shrub or small tree with linear leaves and white flowers, arranged either singly, or with two or three female or two to six male flowers, or a single female flower surrounded by 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>Stachystemon axillaris</i> Species of shrub

Stachystemon axillaris, commonly known as leafy stachystemon, is a species of flowering plant in the family Picrodendraceae and is endemic to the south-west of Western Australia. It is a monoecious shrub with simple, linear to narrowly elliptic or oblong leaves and small yellow flowers arranged singly in upper leaf axils.

<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.

Stachystemon intricatus is a species of flowering plant in the family Picrodendraceae and is endemic to the south-west of Western Australia. It is a compact, densely-branched, monoecious shrub with crowded, elliptic or egg-shaped leaves and small, cup-shaped white flowers arranged singly in upper leaf axils.

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.

Stachystemon mucronatus is a species of flowering plant in the family Picrodendraceae and is endemic to the south-west of Western Australia. It is a compact, monoecious shrub with narrowly oblong or narrowly elliptic leaves and small, greenish yellow flowers arranged singly in upper leaf axils.

References

  1. 1 2 "Ricinocarpos psilocladus". Australian Plant Census. Retrieved 21 September 2023.
  2. 1 2 Halford, David A.; Henderson, Rodney J.F. (2007). "A taxonomic revision of Ricinocarpos Desf. (Euphorbiaceae: Ricinocarpeae, Ricinocarpinae)". Austrobaileya. 7 (3): 424–425. Retrieved 21 September 2023.
  3. 1 2 3 "Ricinocarpos psilocladus". FloraBase . Western Australian Government Department of Biodiversity, Conservation and Attractions.
  4. ↑ "Bertya gummifera var. psiloclada". Australian Plant Name Index. Retrieved 21 September 2023.
  5. ↑ Müller, Johannnes (1864). "Neue Euphorbiaceen des Herbarium Hooker in Kew, auszugsweise vorläufig mitgetheilt aus dem manuscript für De Candolle's Prodromus". Flora oder Botanische Zeitung. 47 (30): 471. Retrieved 21 September 2023.
  6. ↑ "Ricinocarpos psilocladus". Australian Plant Name Index. Retrieved 21 September 2023.
  7. ↑ Sharr, Francis Aubi; George, Alex (2019). Western Australian Plant Names and Their Meanings (3rd ed.). Kardinya, WA: Four Gables Press. p. 285. ISBN   9780958034180.
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