Orbea circes, Orbea deflersiana, Orbea decaisneana, Orbea cooperi, Orbea conjuncta, Orbea chrysostephana, Orbea caudata, Orbea carnosa, Orbea baldratii, Orbea araysiana, Orbea albocastanea, Orbea gerstneri, Orbea wissmannii, Orbea wilsonii, Orbea vibratilis, Orbea ubomboensis, Orbea laticorona, Orbea luntii, Orbea lugardii, Orbea valida, Orbea laikipiensis, Orbea knobelii, Orbea huillensis, Orbea huernioides, Orbea hardyi, Orbea gilbertii, Orbea tubiformis, Orbea tapscottii, Orbea subterranea, Orbea sprengeri, Orbea semitubiflora, Orbea miscella, Orbea gemugofana, Orbea sacculata, Orbea rogersii, Orbea nardii, Orbea cucullata, Orbea fenestrata, Orbea parviloba, Orbea namaquensis, Orbea woodii, Orbea pulchella, Orbea variegata, Orbea ciliata, Orbea longidens, Orbea mcloughlinii, Orbea maculata, Orbea paradoxa, Orbea umbracula, Orbea verrucosa, Orbea halipedicola, Orbea semota, Orbea lutea, Orbea melanantha, Orbea dummeri, Orbea schweinfurthii, Orbea abayensis, Orbea denboefii, Orbea distincta, Orbea taitica,