Agonis theiformis is a species of flowering plant in the family Myrtaceae and is endemic to the southwest of Western Australia. It is a shrub with elliptic to egg-shaped, sometimes broadly egg-shaped leaves, and clusters of white flowers with mostly 15 to 20 stamens opposite the sepals, the fruit a spherical cluster of cup-shaped capsules.
Agonis theiformis is an often spindly shrub that typically grows to a height of up to, its branchlets sometimes zig-zagged and hairy at first, later glabrous. Its leaves are sessile, elliptic to egg-shaped or broadly so, wavy and twisted, long, wide, with a short point on the tip. The upper surface of the leaves is more or less glabrous and the lower surface has a prominent mid-vein and a few soft hairs. The flowers are arranged in clusters in diameter with broadly to very broadly egg-shaped bracts long and densely hairy, and similar bracteoles. The sepals are egg-shaped, long, the petals white and long. There are 15 to 20 stamens with 3 or 4 opposite each sepal, none opposite the petals, long. Flowering mainly occurs from October to December and the fruits are in clusters wide, the individual capsules cup-shaped to broadly top-shaped, wide.[1]
Agonis theiformis was first formally described by Johannes Conrad Schauer in Lehmann's Plantae Preissianae.[2] [3] The specific epithet (theiformis) means Thea-shaped'.[4]
This species of Agonis grows in heath, shrubland and forest on a range of soil types from Northcliffe to Cape Riche and inland to the Stirling Range in the Avon Wheatbelt, Esperance Plains, Jarrah Forest and Warren bioregions of southern Western Australia.