Plants with erect, trailing, or climbing, to at least 3 m long, most parts sparsely to densely puberulent. Leaf blades ovate. 1.3-5 cm long. 1-4.5 cm wide, prominently sinuate to lobed, bases broadly cuneate to truncate, tips subacute to shorthly acuminate. Inflorescences umbels, usually arranged in terminal panicles. Flowers pedicellate; pedicels 1-4(-5) mm long in fruit; perianth limbs pale pink to lilac; stamens 3-4. Anthocarps clavate, up to 8.5 mm long, with uniform sessile or subsessile glands.
Commicarpus sinuatus grows in acacia woodlands at 1300-1700 m. It is known from regions N1-2 of the Flora of Somalia [=Somaliland], Ethiopia, the Sinai, and South Arabia.