quadrifidus is a plant in the myrtle family, Myrtaceae and is endemic to the south-west of Western Australia.

The hypanthium usually has a covering of soft, silky hairs, at least on the lower part and the stamens are arranged in 4 claw-like bundles, each about 22–35 millimetres (0.9–1 in) long.

Flowering mainly occurs from September to December and is followed by fruits which are woody capsules, 7–10 millimetres (0.3–0.4 in) long.

It is found in the western part of the wheatbelt and as far north as Northampton, as far inland as Mullewa and Hyden and as far south as Albany and Israelite Bay.

quadrifidus is classified as "not threatened" by the Western Australian government department of parks and wildlife[3]