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Cymbidium Alliance

Dendrobium Alliance

Pleurothallid Alliance

Maxillaria Alliance

Miscellaneous Genera

The term “Alliance” is used to describe a group of genera that have many common characteristics and can be used for cross breeding.


In the Annual Show, the plants are classed and judged according to their alliance, and “Best of Alliance” awards are given. The Vanda Alliance is split into two for convenience, because of the large number of Phalaenopsis entries. The table at the right shows the alliances used in the Ottawa Orchid Society Show.


Cattleya Alliance

Cypridedium Alliance

Vanda Alliance (Phalaenopsis)

Vanda Alliance (except Phalaenopsis)

Oncidium Alliance