Actinodium

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title: "Actinodium" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["rosids-of-western-australia", "monotypic-myrtaceae-genera", "myrtales-of-australia", "myrtaceae", "plants-described-in-1836", "taxa-named-by-johannes-conrad-schauer", "endemic-flora-of-southwest-australia"] description: "Genus of flowering plants" topic_path: "geography/australia" source: "https://en.wikipedia.org/wiki/Actinodium" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0

::summary Genus of flowering plants ::

|name = Swamp daisy |image = CSIRO ScienceImage 2909 The Swamp Daisy Actinodium cunninghamii.jpg |image_caption = Undescribed Albany daisy, Actinodium sp. 'Fitzgerald River' |genus = Actinodium |parent_authority = Schauer |species = cunninghamii |authority = Schauer |synonyms_ref = |synonyms =

• Actinodium proliferum Turcz.
• Triphelia brunioides R.Br. ex Endl. nom. illeg.

Actinodium cunninghamii, commonly known as swamp daisy or Albany daisy, is the only formally described species in the genus of flowering plants in the family Myrtaceae, Actinodium and is endemic to Western Australia.

Description

Actinodium cunninghamii is a small, compact shrub that typically grows to a height of up to 30 cm with leaves about 4 mm long and 1–2 mm wide. The flowers are borne in pinkish-brown, daisy-like heads 20–30 mm in diameter. The heads are made up of tiny, bell-shaped flowers surrounded by sterile, strap-like ray flowers.

A related, but as yet undescribed species presently given the name Actinodium sp. 'Fitzgerald River' and also commonly known as Albany daisy, is a sparsely-branched shrub up to 1 m high with leaves 5–6 mm long, the heads pink and white and 40–50 mm wide. This species is more common than A. cunninghamii.

Taxonomy

The genus Actinodium was first formally described in 1836 by Johannes Conrad Schauer in the journal Linnaea, Ein Journal für die Botanik in ihrem ganzen Umfange and Schauer later described Actinodium cunninghamii in John Lindley's A Natural System of Botany from specimens collected by Allan Cunningham. The genus name is derived from Greek and means "like the spokes of a wheel".

Distribution and habitat

Actinodium cunninghamii grows in moist, sandy soil in forest and kwongan and is uncommon in nature. Both species of Actinodium usually grow in winter-wet depressions in near-coastal areas near Albany in the south-west of Western Australia.

Use in horticulture

Actinodium sp. 'Fitzgerald River' (sometimes as A. cunninghamii) has been grown in gardens but is a short-lived plant requiring good drainage and a sheltered position. It can be propagated from cuttings.

Cultural references

An image of A. cunninghamii was engraved for an Australian Stamp in 1985.

References

References

1. "''Actinodium''". Australian Plant Census.
2. "''Actinodium cunninghamii''". Australian Plant Census.
3. (2009). "Wildflowers of southern Western Australia". Rosenberg Pub.
4. {{FloraBase
5. "''Actinodium'' sp. 'Fitzgerald River'". Botanic Gardens and Parks Authority.
6. "''Actinodium''". APNI.
7. (1836). "Genera Chamaelauciearum Nova Quaedam". Linnaea: Ein Journal für die Botanik in ihrem ganzen Umfange, oder Beiträge zur Pflanzenkunde.
8. "''Actinodium''". APNI.
9. (1836). "A Natural System of Botany". Longman, Rees, Orme, Green and Longman.
10. (2019). "Western Australian Plant Names and Their Meanings". Four Gables Press.
11. {{FloraBase
12. "''Actinodium cunninghamii''". Australian Native Plants Society (Australia).
13. "''Actinodium cunninghamii''". Australian National Herbarium ANBG symbol.

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