 Summerfield Orchids ENGLISH Selection of species and hybrids offered. Donna Harig. Petersburg, Michigan, USA. |
| Sun Coast Orchids ENGLISH Wholesale orders and retail store. Phalaenopsis, Cattleyas, Cymbidiums, Dendrobiums and other genera offered. Beth F. Cox and Geraldine A. Powell. Signal Mountain, Tennessee, USA. |
| Sunset Orchids ENGLISH Catalog listing of orchids for sale. Colma, California, USA. |
| Sunset Valley Orchids ENGLISH Several genera of orchids available including Cattleya, Paphiopedilum, Phragmipedium, Bulbophyllum, and Zygopetalum. Fred Clarke. Vista, California, USA. |
 Suomen Orkideayhdistys FINNISH / SWEDISH / ENGLISH Membership information for the Finnish Orchid Society. Culture notes and photos. Helsinki, Finland. |
| Susquehanna Orchid Society ENGLISH Meetings, contact, and events info. Members from the lower Susquehanna Valley. Founded in 1979. Camp Hill, Pennsylvania, USA. |
| Suwada Orchid Nursery JAPANESE / ENGLISH Specializing in Cattleya Alliance hybrids and species. Koichi and Munekazu Ejiri. Established in 1945. Suwada, Ichikawa, Chiba, Japan. |
| Suzuki Orchids JAPANESE Orchid pictures and message board. Masataka Suzuki. Japan. |
| Svenska Orchidesallskapet SWEDISH / ENGLISH / GERMAN Swedish Orchid Society. Contact, show, discussion forum, and event information. Sweden. |
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