Xanthosia rotundifolia

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Southern cross

Xanthosia rotundifolia near Torndirrup
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Eudicots
Clade:	Asterids
Order:	Apiales
Family:	Apiaceae
Genus:	Xanthosia
Species:	X. rotundifolia
Binomial name
*Xanthosia rotundifolia* DC.^[1]
Synonyms^[1]
Leucolaena rotundifolia (DC.) Benth. Leucolaena rotundifolia (DC.) Benth. var. rotundifolia Xanthosia rotundifolia var. hypoleuca Diels Xanthosia rotundifolia DC. var. rotundifolia

Xanthosia rotundifolia, commonly known as southern cross, is a species of flowering plant in the family Apiaceae and is endemic to the south-west of Western Australia. It is an erect, perennial herb with serrated or toothed leaves and white to creamy-yellow flowers.

Description

Xanthosia rotundifolia is an erect perennial herb that typically grows to a height of up to 60 cm (24 in).^[2] Its leaves are round to egg-shaped or wedge-shaped, and leathery^[2] with serrated or toothed edges.^[3] The flowers are arranged in a compound umbel usually with four branches in the form of a cross, each branch 30–60 mm (1.2–2.4 in) wide with a petal-like bract 15 mm (0.59 in) long at the base.^[2] Flowering occurs over a long period with a peak in spring.

Taxonomy

Xanthosia rotundifolia was first formally described in 1829 by Augustin Pyramus de Candolle in Collection de Mémoires pour Servir a l'Histoire de Regne Vegetal.^[4]^[5] The specific epithet (rotundifolia) means "round-leaved".^[6]

Distribution and habitat

Southern cross grows in gravelly, lateritic soils in rocky places, swamps and open woodland in the Esperance Plains, Jarrah Forest and Warren bioregions of the south-west of Western Australia.^[2]^[7]

References

^ ^a ^b "Xanthosia rotundifolia". Australian Plant Census. Retrieved 10 April 2024.
^ ^a ^b ^c ^d Cronin, Leonard (2016). Australian Wildflowers. Crows Nest: Allen & Unwin. p. 12.
^ Corrick, Margaret G.; Fuhrer, Bruce A. (2013). Wildflowers of Southern Western Australia. Dural, New South Wales: Rosenberg Publishing pty. ltd. p. 21.
^ "Xanthosia rotundifolia". Australian Plant Name Index. Retrieved 10 April 2024.
^ de Candolle, Augustin P. (1829). Mémoire sur la famille des Ombellifères. Paris: Treuttel et Würtz. p. 31. Retrieved 10 April 2024.
^ Sharr, Francis Aubi; George, Alex (2019). Western Australian Plant Names and Their Meanings (3rd ed.). Kardinya, WA: Four Gables Press. p. 297. ISBN 9780958034180.
^ "Xanthosia rotundifolia". FloraBase. Western Australian Government Department of Biodiversity, Conservation and Attractions.

Taxon identifiers
Xanthosia rotundifolia	Wikidata: Q8043115 APNI: 54783 CoL: 7G92Y FloraBase: 6292 GBIF: 6027130 iNaturalist: 121653 IPNI: 850027-1 NCBI: 665739 NZOR: a67198b9-bf8e-4385-92c2-a29036b83b88 Open Tree of Life: 913786 POWO: urn:lsid:ipni.org:names:850027-1 Tropicos: 50275161 WFO: wfo-0000428738

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