Plants perennial herbs; stems prostrate or twining, up to 1 m long or more.Leaves alternate, petiolate; petioles up to 13 mm long; blades oblong or triangular-ovate to linear, 2.5-7 cm long, 0.6-2.6 cm wide, pubescent ore glabresent, bases hastate to sagittate or almost truncate at the bases, the lobes often 2-fid, tips acute. Cymes with 1-3(-several) flowers, pubescent; peduncles 2.4-4.5 cm long; pedicels about 0.5 cm long; bracts about 2-3 mm long, linear. Sepals orbicular, ovate, or elliptic, 5-9 mm long, 2.5-4.5 mm wide, pubescent; corollas white or pale pink, sometimes with darker centres, 8-12(-20) mm long. Capsules 6-7 mm long; seeds about 3.5 mm long, 2.5 mm wide, rough.
Convolvulus sagitattus grows in bushland an on gypsum soils at 1850-2025 m. It is know from region N2 of the Flora of Somalia and from Ethiopia south to South Africa and east to Yemen.
Some taxonomists recognize varieties within C. sagitattus but Thulin treated it as a single, variable species in the Flora of Somalia.