Their web site has some excellent pictures. Membership is for a calendar year, and includes the quarterly journal Principes , access to a seed bank and book store, information on regional chapters, and a biennial meeting. See the links section for even more sources of plants and seeds. More variety than anyone else. Catalog is informative.
Palms are sometimes on the small side.
You can order their catalog from the web . Small palms, yuccas, agaves, cycads, aloes, dasylirons, nolinas, puyas, bromeliads. Good prices on small plants, the selection changes and rare plants are sometimes available. Seed Service Inge Hoffman 695 Joaquin Ave. You check the species that you want from a huge list, and prepay.