or·chi·da·ceous 
(ôr′kĭ-dāshəs)
(ôr′kĭ-dāshəs)adj.
1. Of, relating to, or characteristic of the orchid family.
2. Suggesting an orchid flower in extravagance, exoticism, or luxuriant beauty: "one of those brilliant orchidaceous days on the North Shore of Oahu" (Paul Theroux).
[From New Latin Orchidāceae, family name, from Latin orchis, orchid; see ORCHID.]