H.-D. Ihlenfeldt (2006) Pedalium in Flora of Somalia 3:368
Stems erect to ascending, 10-75 cm long or tall. Leaves petiolate; petioles 0.5-3.5 cm long; blades oblong to elliptic, 1.5-5 cm long, 0.8-3.5cm wide, tips rounded or truncate. Corollas creamy yellow to white, usually with a purple blob in the throat; tubes 2-2.5 cm long; limbs 1.5-2 cm in diameter. Fruits 1-2 cm long.
Pedalium murex grows in bushland, in deep sange, usually close to the sea and often on dunes and in saline soils. The Flora of Somalia gives its distribution as C1 and S2-3, but it is also reported to grow in Somaliland. It also reports that it grows in in eritrea, Socotra, Keny, Sudan and many other tropical African countries.
Ihlenfeldt (2006) commented that plants from Somalia are perennial with an often-deveoped caudex and are relatively small and erect and their flowers usually have the purple blotch in their throat whereas the more or less weedy forms from Inida are much larger, annual plants that lack a caudex and have prostrate shoots that only ascend at the ends. Also, their flowers lack the purple blotch in their flowers. The fruits in both areas are very similar. He suggested that the plants from Somalia might merit taxonomic recognition, but further research would be necessary to establish this.