- Botany encyclopedia of plants ...www.botany.com
- www.botanical.com/botanical/mgmh/mgmh.html
- The Virtual Palm Encyclopedia provides a wealth of information on a wide variety of topics relating to palms, and includes lots of palm photos and palm-related links.plantapalm.com/vpe/vpe_index.htm
- Succulent Cracculaceae photo gallery - collection of succulent photos by Peter Lapshin ...www.lapshin.org/succulent
- www.bbg.org/sci/nymf/encyclopedia
