Cactaceae: With Illustrated Keys of All Tribes, Sub-tribes and Genera

1/2 inch long acicular apex areoles areoles small Argentina axils Backeberg base Bckbg Berg Berger Bolivia branches Brazil bristles Britton and Rose brown tips Cact Cactaceae cacti Cactus California central spines cephalium Cephalocereus Cereus Cespitose clusters color Coryphantha Culture curved cylindrical dark green Desirable species Echinocactus Echinopsis Engel erect flattened flower FIG flower tube flowers arise flowers white Fric fruit funnel-shaped genera genus globe-shaped globose glochids grafted Graham Heid gray groove Gurke Habitat hairs hooked inches high inches in diameter joints Knuth Lobivia Malacocarpus Mammillaria Mexico naked Notocactus numerous Opuntia Otto oval ovary Pachycereus pale Pereskia Pereskiopsis perianth Peru petals Photo by Scott Pilocereus pink plants radial spines Rebutia RECENT NEW SPECIES reddish resembles ribs Salm-Dyck scales Schum Scott Haselton seedlings seeds short Simple slender Speg spiny spreading stems SUB-TRIBE subulate Thelocactus tubercles usually Vaupel Weber Werd white wool woolly yellowish