Its leaves are ovate, opposite, and large, up to 21 cm, with a coarsely-toothed margin.

[7] Its flowers form a large open and branched inflorescence, 15-35 cm long, made up of 1 to 9-flowered groups.

The flowers are five-petaled, white to pale mauve with an orange-brown throat and one or two yellow markings.

[7] Mimulopsis solmsii is native to the mountains of tropical Africa, including Guinea, Liberia, and Sierra Leone in West Africa, Cameroon, Nigeria, and the Gulf of Guinea Islands in west-central Africa, and Ethiopia, South Sudan, Kenya, Uganda, Tanzania, Democratic Republic of the Congo, Rwanda, Burundi, Malawi, Mozambique, Zambia, and Zimbabwe in eastern Africa.

[2] It grows in the understorey of and along the margins of evergreen montane forests between 950 and 2300 meters elevation.