Based on M. Thulin (2006) Flora of Somalia 3:241-242
Plants slender twining or prostrate herbs. Stems angular to narrowly winged. Leaves simple, bases truncate, hastate or auriculate, margins dentate toto pinnately lobed. Inflorescnces axillary, 1-2(-3) flowered pedunculate symes. Sepals subequal or the outer 2 longer, margins entire, undulate, or pinnately incised, tips long acuminate or emarginate and mucronate; corollas yellow to white, glabrous; anthers longitudinally dehiscing; pollen pantoporate; ovaries usually densely pubescent, sometimes glabrous. Fruits 4-valved, chartaceous capsules; seeds 1-4, ovoid, glabrous.
Xenostegia includes about 7 species, all of which are native to tropical Africa. Two are known from Somaliland and Somalia.
Key to the species of Xenostegia in Somaliland and Somalia.
Simoes, A.R., A. Culham, & M. Carine (2015) Resolving the unresolved tribe: a molecular phylogenetic framework for the Merremieae (Convolvulaceae). Botanical Journal of the Linnean Society, 2015, 179, 374–387.
Sosef, M.S.M., Roy E. . Gereau, Steven B. Janssens, Modestine Kompanyi, Ana R. Simões "A Curious New Species of Xenostegia (Convolvulaceae) from Central Africa, with Remarks on the Phylogeny of the Genus," Systematic Botany, 44(2), 405-414, (30 May 2019)
Note: GBIF records include introduced and cultivated plants. Consequently, the distribution shown often differs from statements about a taxon's native distribution.