Ricinocarpos graniticus

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Ricinocarpos graniticus
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. graniticus
Binomial name
Ricinocarpos graniticus

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.

Contents

Description

Ricinocarpos graniticus is a monoecious shrub that typically grows to height of up to 2 m (6 ft 7 in), its young branchlets glabrous. The leaves are linear, 15–40 mm (0.59–1.57 in) long and 1.2–1.5 mm (0.047–0.059 in) wide on a glabrous petiole 1–2 mm (0.039–0.079 in) long. The upper surface of the leaves is smooth and glabrous and the lower surface is covered with woolly white hairs. The flowers are arranged either as a single male or female flower, or with a single female flower surrounded by one or two male flowers. Male flowers are on a slender pedicel 6–9 mm (0.24–0.35 in) long, the sepals joined at the base and more or less glabrous, the sepal lobes egg-shaped, 4.0–4.2 mm (0.16–0.17 in) long, the petals creamy white and lance-shaped or oblong, 6–8 mm (0.24–0.31 in) long and 1.5–2.4 mm (0.059–0.094 in) wide. Each male flower has about 35 stamens. Female flowers are on a stout pedicel 5–10 mm (0.20–0.39 in) long. Flowering has been observed from June to September, and the fruit is an elliptic capsule about 7 mm (0.28 in) in diameter. [2] [3]

Taxonomy and naming

Ricinocarpos graniticus was first formally described in 2007 by David Halford and Rodney Henderson in the journal Austrobaileya from specimens collected in the Darling Range in 2004. [2] [4] The specific epithet (graniticus) means "living on "granitic soil", referring to the granite rock outcrops where this species is found. [2] [5]

Distribution and habitat

This species grows in low scrub on granite outcrops on the Darling Range, with a disjunct population near Newdegate, in the Avon Wheatbelt, Jarrah Forest, Mallee and Swan Coastal Plain bioregions of south-western Western Australia. [2] [3]

Related Research Articles

<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.

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

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

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

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<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.

<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.

References

  1. "Ricinocarpos graniticus". Australian Plant Census. Retrieved 30 August 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): 410–412. Retrieved 30 August 2023.
  3. 1 2 "Ricinocarpos graniticus". FloraBase . Western Australian Government Department of Biodiversity, Conservation and Attractions.
  4. "Ricinocarpos graniticus". Australian Plant Name Index. Retrieved 30 August 2023.
  5. Sharr, Francis Aubi; George, Alex (2019). Western Australian Plant Names and Their Meanings (3rd ed.). Kardinya, WA: Four Gables Press. p. 210. ISBN   9780958034180.