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Marianthus tenuis - Wikipedia

From Wikipedia, the free encyclopedia

Marianthus tenuis

Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Eudicots
Clade:	Asterids
Order:	Apiales
Family:	Pittosporaceae
Genus:	Marianthus
Species:	M. tenuis
Binomial name
*Marianthus tenuis* Benth.^[1]
Synonyms^[1]
Billardiera parviflora DC. Billardiera parviflora var. guttata E.M.Benn. Billardiera parviflora DC. var. parviflora Marianthus gracilis Ostenf.

Marianthus tenuis is a species of flowering plant in the family Pittosporaceae and is endemic to the southwest of Western Australia. It is a slender, twining shrub with clustered, narrowly elliptic leaves and white flowers tinged with mauve and with darker spots on three of the five petals.

Description

Marianthus tenuis is slender, twining shrub with silky-hairy new shoots. Its adult leaves are narrowly elliptic and clustered, 15–34 mm (0.59–1.34 in) long and 4–7 mm (0.16–0.28 in) wide. The flowers are borne in small groups on a peduncle 12–15 mm (0.47–0.59 in) long, each flower on a pedicel less than 5 mm (0.20 in) long. The sepals are silky-hairy and about 4 mm (0.16 in) long. The five petals are white with a mauve tinge, 10–12 mm (0.39–0.47 in) long and about 2.7 mm (0.11 in) wide. Three of the petals develop darker spots as they age. Flowering occurs in November or from January to June with a peak from March to April. The fruit is an elliptic capsule 8–9 mm (0.31–0.35 in) long and about 5 mm (0.20 in) in diameter.^[2]^[3]^[4]

Taxonomy

Marianthus tenuis was first formally described in 1863 by George Bentham in Flora Australiensis.^[5]^[6] The specific epithet (tenuis) means "thin, fine or slender".^[7]

The name Marianthus tenuis is a replaced synonym of de Candolle's Billardiera parviflora, described in his 1824 Prodromus Systematis Naturalis Regni Vegetabilis.^[8]^[9]

Distribution and habitat

Marianthus tenuis grows in open coastal heath on limestone and in woodland on laterite south from the Darling Range in the Avon Wheatbelt, Jarrah Forest, Swan Coastal Plain and Warren bioregions of south-western Western Australia.^[2]^[3]

Conservation status

This marianthus is listed as "not threatened" by the Government of Western Australia Department of Biodiversity, Conservation and Attractions.^[2]

References

^ ^a ^b "Marianthus tenuis". Australian Plant Census. Retrieved 30 June 2023.
^ ^a ^b ^c "Marianthus tenuis". FloraBase. Western Australian Government Department of Biodiversity, Conservation and Attractions.
^ ^a ^b "Marianthus tenuis". Australian Biological Resources Study, Department of Agriculture, Water and the Environment: Canberra. Retrieved 30 June 2023.
^ Cayzer, Lindy; Crisp, Mike (2004). "Reinstatement and revision of the genus Marianthus (Pittosporaceae)". Australian Systematic Botany. 17 (1): 127–44. doi:10.1071/SB03029.
^ "Marianthus tenuis". APNI. Retrieved 30 June 2023.
^ Bentham, George (1863). Flora Australiensis. Vol. 1. London: Lovell Reeve & Co. p. 119. Retrieved 30 June 2023.
^ William T. Stearn (1992). Botanical Latin. History, grammar, syntax, terminology and vocabulary (4th ed.). Portland, Oregon: Timber Press. p. 511.
^ "Billardiera parviflora". APNI. Retrieved 30 June 2023.
^ de Candolle, Augustin P. (1824). rodromus Systematis Naturalis Regni Vegetabilis. Vol. 1. Paris. p. 345. Retrieved 30 June 2023.

Taxon identifiers
Marianthus tenuis	Wikidata: Q51051213 APNI: 101797 CoL: 3Y68P FloraBase: 17630 FoAO2: Marianthus tenuis GBIF: 4161643 IPNI: 684348-1 POWO: urn:lsid:ipni.org:names:684348-1 Tropicos: 50259454 WFO: wfo-0000452576

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