Echeveria

Walther, Eric

Copiapoa in Their Environment

Schultz, Rudolf; Attila Kapitany

Cacti & Their Cultivation

Martin, Margaret J.; P.R. Chapman; H.A. Auger

The Color Encyclopedia of Cape Bulbs

Manning, John; Peter Goldblatt; Dee Snijman

A Gallery of Agaves [including variegates]

Pilbeam, John

A Cactus Odyssey

Mauseth, James D.; Roberto Kiesling; Carlos Ostolaza

The Biology of Nectarines

Bentley, Barbara; Thomas Elias [Editors]

Growing Points in Ethology

Bateson, P.P.G. & R.A. Hinde

The Euphorbia Journal. Complete Set of Volumes 1 - 10

Flora of North America, Volume 7: Magnoliophyta: Salicaceae to Brassicaceae

Flora of North American Editorial Committee

Flora of North America, Volume 5: Magnoliophyta: Caryophyllidae, part 2

Flora of North America Editorial Committee

Flora of North America, Volume 3: Mangoliophyta: Magnoliidae and Hamamelidae