Lake Varley Grevillea

Grevillea involucrata is a shrub in the family Proteaceae, characterised by the toothbrush-style flower clusters typical of many grevilleas, enclosed within distinctive bracts (involucres) from which the species takes its scientific name. As with related Proteaceae, its flowers are adapted for pollination by nectar-feeding birds and insects, and the plant contributes to the structure and floristic diversity of the shrubland communities it inhabits.

The species is restricted to a small area of Western Australia, in the vicinity of Lake Varley, where it occupies native shrubland habitat. Its distribution is highly localised, with populations confined to remnant vegetation patches in a landscape that has been extensively modified for agriculture.

The primary threats to this species stem from its proximity to roads and railway corridors, where maintenance activities, vegetation clearing, and edge effects can damage or destroy individual plants and disrupt habitat continuity. Inappropriate fire regimes, including both wildfire and fire suppression practices that alter natural disturbance cycles, also pose an ongoing risk, as many Proteaceae species have specific fire-response requirements for regeneration and seed release that can be disrupted by changed fire frequency or intensity.

Conservation attention for this species is typically directed through Western Australian threatened flora programs, which may include population monitoring, protection of roadside and rail reserve populations from clearing, and management of fire regimes in remaining habitat fragments. Specific population figures are not available.

Given its restricted range, small number of known populations, and continued exposure to infrastructure-related and fire-related pressures, Grevillea involucrata remains at serious risk of further decline, consistent with its Critically Endangered status and a decreasing population trend.