National
American Orchid Society (AOS)
Canadian Orchid Congress (COC)
New England
Amherst Orchid Society
Cape & Islands Orchid Society (CAIOS)
Connecticut Orchid Society (COS)
Maine Orchid Society
New Hampshire Orchid Society (NHOS)
Nutmeg State Orchid Society
North Shore Orchid Society (NSOS)
Ocean State Orchid Society (OSOS)
Twin States Orchid Society (TSOS) - NH/VT border