Bob Webb and Toni Yocum have travelled extensively in Arabia and East and Southern Africa, and despite having other plant objectives have seen a large number of Euphorbia in habitat. In addition, Arid Lands Greenhouses, which they owns, has one of the world's largest collections of Euphorbias in cultivation. This talk explores several groups of Euphorbia: trees, medusoids, mound formers, and globose species. The emphasis will be on growing these plants in cultivation while learning a few things about them from habitat.