Sprawling or decumbent shrublet up to 30cm. Leaves with axillary tufts, linear, pungent, coarsely ciliate, sometimes prickly-toothed or roughly hairy, margins revolute; bracts differing from leaves in size and form, ovate-acuminate, toothed above, ciliate below, sometimes roughly hairy; flowers in terminal heads, white or pale-blue, 8-10mm across, ovary glabrous or minutely hairy.