Rounded perennial to 20 cm high. Branches closely woolly. Leaves erect, linear, c. 10 mm long, appressed-villous, fleshy. Flowers solitary. Perianth almost glabrous except the woolly ciliate lobes. Stamens 5. Fruiting perianth glabrous, dark red or reddish brown; tube shortly cylindrical to depressed-globose, c. 2 mm high and wide, deeply hollowed in lower half, the attachment circular; limb short, incurved; spines 2, divergent, to 2.5 mm long, sometimes one or both reduced and knob-like; tubercle prominent, adjacent to a spine, decurrent as a rib.
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