Plants perennial herbs to subshrubs, 20-60 cm tall, richly branched, ascending; stems densely covered by appressed, whitish hairs. Leaves petiolate; petioles 4-18 mm long; blades 10-70 mm long, 4-30 mm wide, elliptic, margins entire near the base, sometimes becoming sinuate or dentate distally. Flowers pedicillate; sepals 8-12 mm long; petals abot 25 mm long and 12 mm wide, pale to deep violet, bases distincly clawed. Fruiting pedicels 2.5- 9 mm long, ascending to erect; siliques 11-26 mm long, about 2.5 mm wide, straight; valves keeled, terminating in horns about 5 mm long; stigmas with or without short, lateral projections; seeds about 1 mm long, subglobose to ellipsoid, not winged.
Diceratella incana grows in stony ground, on slopes and in alluvial depressions at 160-1680 m. It is known from regions N1-3 and C2 of the Flora of Somalia, southeastern Ethiopia and northern Kenya.