 | Siam Orchids (USA) ENGLISH / SPANISH / GERMAN / ITALIAN / DUTCH Specializing in Vandas and Ascocendas. Glenn Behrman. Homestead, Florida, USA.  |
|
 | Silk Synergy ENGLISH Offering orchid art, and art-to-wear, based on original silk paintings by Julianne Jennings (Georgia), Merridee Joan Smith (California), Karen Sistek (Washington), and Janet Haefner (Arizona).  |
|
 | Silva Orchids ENGLISH Second generation nursery providing high quality seedling and mericlone hybrids and species. Joseph and Anthony Silva. Neptune, New Jersey, USA.  |
|
 | Sioux Falls Orchid Club ENGLISH Orchid club in the Sioux Falls area aimed at sharing the interest in growing and cultivating orchids. Membership, meeting and contact info. Sioux Falls, South Dakota, USA.  |
|
 | Slipper Orchid Alliance ENGLISH Resource center dedicated to the slipper group of orchids including Paphiopedilum, Phragmipedium, Cypripedium, Mexipedium and Selenipedium. Quarterly newsletter. Pittsburgh, Pennsylvania, USA.  |
|
 | Slipper Orchid Forum ENGLISH Message board for Paphiopedilum, Phragmipedium, Mexipedium, Selenipedium, and Cypripedium enthusiasts.  |
|
 | Slipper Orchid Info ENGLISH Paphiopedilum, Phragmipedium, and Cypripedium taxonomy. Blooming seasons and awards data. Images and literature scans. Stephen Manza. Gaithersburg, Maryland, USA.  |
|
 | SlipperOrchid.com ENGLISH Paphiopedilum and Phragmipedium information. Matt Pedersen. Lincolnwood, Illinois, USA.  |
|
 | Slippertalk.com ENGLISH Web-based forum to discuss Paphiopedilum, Phragmipedium, Cypripedium, Mexipedium and Selenipedium orchids. Topics include culture, taxonomy, breeding, production, awards, pests, photographs, sale/trade, and a wanted section.  |
|
 | SLO Gardens Orchids ENGLISH Bulbophyllum, Cattleya, Dendrobium, Dendrochilum, Dracula, Masdevallia, Oncidium, and other genera available. Established in 1985. Rudy and Anne Bachmann. Arroyo Grande, California, USA.  |
|
 | Slovenian Orchid Society (DLOS) SLOVENIAN / ENGLISH Membership, activities,and events info. Also articles and a photo gallery. Founded in 2003 in Ljubljana, Slovenia.  |
|
 | Sobha Orchids ENGLISH Orchid genera offered includes Phalaenopsis, Vanda, Cattleya, Dendrobium, and Oncidium. Culture notes. Kanimangalam, Kerala, India.  |
|
 | Sociedad Colombiana de Orquideologia SPANISH / ENGLISH Membership, contact, and activities information. List of orchid species found in Colombia. Publishers of the magazine "ORQUIDEOLOGIA", and several other printed paper information sources. Founded in 1964. Medellín, Colombia.  |
|
 | Sociedad de Orquideología del Caroní (SOC) SPANISH The Orchid Society of Caroni focuses on educational activities and the conservation of orchids found in the Guayana Region. Puerto Ordaz, Ciudad Guayana, Bolivar State, Venezuela.  |
|
|