| Bromeliad Society International with Bromeliad Cultivar Register |
| Bromeliad Society of Germany (DBG) |
| Bromelia Contactgroep,
Dutch-Belgian Bromeliad Society |
| Bromeliad Society of Japan |
| Bromeliad Society of Australia Inc. |
| Cryptanthus Society |
| Bromeliad Society International with Bromeliad Cultivar Register |
| Bromeliad Society of Germany (DBG) |
| Bromelia Contactgroep,
Dutch-Belgian Bromeliad Society |
| Bromeliad Society of Japan |
| Bromeliad Society of Australia Inc. |
| Cryptanthus Society |
| Bromeliário Imperialis | Osca Ribeiro (Brazil), habitat documentation (also files from Derek Butcher) |
| The Bromeliad Court | Tennis Maynard (USA), private collection |
| Bromeliad Forum | forum from South Africa |
| Bromelien Sammlung Hromadnik | Lieselotte and Helmut Hromadnik (Austria), also habitat-photos |
| Brötzmann's Tillandsienseite | Manfred Brötzmann (Germany), private collection |
| DBG-Forum | Forum der Deutschen Bromelien-Gesellschaft e.V. |
| Dyckia Brazil | Constantino Gastaldi (Brazil), many photos of Dyckias |
| GardenWeb | forum from USA |
| Paul's Broms | Paul Wingert |
| The Paradise: cacti, bromeliads
and nature in Brazil | Eddie Esteves (Brazil), many photos of unpublished species |
| Tillandsia-web | Andreas Böker (Germany), private collection |
| Tillandsia World | Akira Shimazaki (Japan), private collection |
| Truchlik's Tillandsia | Walter Truchlik (Austria), private collection |
| World of Tillandsias | Jan Maruska (Czech Republic) |
| Xeric Plants Discussion Forum Agaveville | forum from USA |
