Bob Webb: Euphorbias II: “Spiny Shrubs and Mound Formers”

Picture of Dr. Robert Webb and desert cacti and succulents

Join us Saturday, February 19th at 10:00 a.m. PST for the next in our series of webinars featuring Cactus and Succulent experts from around the world.


Euphorbias II – Spiny Shrubs and Mound Formers. Robert Webb has been giving a series of talks about Euphorbias. In this installment, he explores some of the intermediate-scale species of Euphorbia. The focus will be on plants in Yemen, East Africa, South Africa, and Namibia with some limited discussion on horticulture and propagation. Using an approach of mostly field-cultivation images, he will discuss some of the interesting species of Euphorbias in these two groups.

Short Bio

Dr. Robert H. Webb has worked on long-term changes in natural ecosystems of the southwestern United States and Baja California since 1976. He has degrees in engineering (B.S., University of Redlands, 1978), environmental earth sciences (M.S., Stanford University, 1980), and geosciences (Ph.D, University of Arizona, 1985). Since 1985, he has been a research hydrologist with the U.S. Geological Survey in Tucson and an adjunct faculty member of the School of Natural Resources and the Department of Hydrology and Water Resources at the University of Arizona. In addition to his research on long-term change in desert regions, he has collected succulent plants and cacti for 40 years, Webb has authored or edited 14 books and about 225 scientific publications. He and his wife are the owners of Arid Lands Greenhouses in Tucson, Arizona, and Webb is the former chairman of the International Sansevieria Society. They have traveled extensively in Africa and Arabia, looking for and photographing succulent plants. They have been to Oman, Yemen, Socotra, Kenya, Tanzania, Uganda, Namibia, Botswana, and South Africa.

He has described and named ten species or subspecies of plants, including two Agave species from Baja California, Mexico, and eight Sansevieria species or subspecies from East Africa.

Bob Webb: Euphorbias II: “Spiny Shrubs and Mound Formers”

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