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Dwarf, rigid, densely branched, spiky shrub, up to 200 mm tall, branches 1-2.5 mm diam., pubescent to tomentose, whitish grey to green, tips spinescent. Leaves ± cordate-deltoid, 2-8 x 1-4 mm, grey-green. Flowers 1-6, in sessile, extra-axillary clusters, pedicels 2-4 mm long. Corolla urceolate-truncate, 1.5-3 mm diam., pubescent outside, greenish yellow, lobes 0.6-1 mm long, folded inwards lengthwise, bent at right angles to tube into mouth to close it, converging in centre.
Somewhat rigid, spiky shrublet to 30 cm; sap clear. Leaves opposite, 2-8 mm, caducous. Flowers 2-4 mm long, greenish yellow.
A small shrub. It grows 10-60 cm tall.
