Styphelia annulata is a species of flowering plant in the heath family Ericaceae and is endemic to the south-west of Western Australia. It is low, compact shrub with spirally arranged, sharply pointed, narrowly egg-shaped or egg-shaped leaves and white, tube-shaped flowers.
Description Styphelia annulata is a low, usually compact shrub that typically grows up to high and wide, occasionally up to , its young branchlets usually hairy, sometimes glabrous. The leaves are spirally arranged, narrowly egg-shaped or egg-shaped, long and wide on a petiole long. The flowers are usually borne in erect groups long with two to five erect sessile flowers. The bracts are narrowly egg-shaped to egg-shaped, long, wide, the bracteoles similarly shaped, long and wide. The sepals are narrowly egg-shaped, long and the petals white, and form a tube long, the lobes white, often flushed with pink, long. The anthers are fully enclosed in the petal tube, long. Flowering mainly occurs from September to November and the fruit is spindle-shaped, usually curved, long and circular in cross section.
Taxonomy Styphelia annulata was first formally described in 2022 by Michael Hislop in the Nuytsia from specimens collected by Richard Cowan on Sounness Farm, near Stirling Range National Park in 1986. The specific epithet (annulata) means 'furnished with a ring', referring to the ring of hairs at the base of the ovary.
Distribution and habitat This styphelia is widely distributed in an area between Muchea, Bolgart and Dowerin in the north and from south-west of Mount Barker and Ongerup in the south, in the Avon Wheatbelt, Esperance Plains, Jarrah Forest, Mallee and Swan Coastal Plain bioregions of south-western Western Australia.
Conservation status Styphelia annulata is listed as 'not threatened' by the Government of Western Australia Department of Biodiversity, Conservation and Attractions.
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