Othonna is a genus of evergreen or deciduous geophytes, dwarf succulents or shrubs belonging to the sunflower family Asteraceae. The genus includes more than 100 species concentrated in the Western Cape of South Africa and southern Namibia. A few species occur in summer rainfall parts of southern Africa. The genus is closely allied to Senecio and can be distinguished principally by details of the involucre. Taxonomically they are in need of a modern revision.

Othonna cylindrica commonly known as Ossierapuisbos in Afrikaans is a South African indigenous species from the Eastern Cape, Northern Cape and Western Cape Provinces. It is synonymously known as Cacalia cylindrica and Othonna tenuissima. Othonna cylindrica grows to 1 meter tall. It is a loosely branched shrub. From autumn to spring it bears yellow to orange flower.