Intricately-branched shrub 10–60 cm high, loosely white-woolly all over. Leaves alternate, suberect (if small) to spreading, narrowly deltoid to narrowly oblong, mostly 2–5 mm long. Flowers solitary, bisexual, glabrous. Fruiting perianth glabrous or rarely the upper perianth pubescent, straw-coloured when dry; attachment excentric on a hollow stipe to 1 mm long produced from base of tube; tube turbinate, 1–2 mm high, thin-walled and readily crushed; wing simple, c. 10 mm diam., papery, faintly nerved, with a radial (radicular) slit; upper perianth usually sunken, covering ovary, with 5 ridges extending radially between lobes.
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