Definify.com
Webster 1913 Edition
Air plant
Air′ plantˊ
.(Bot.)
A plant deriving its sustenance from the air alone; an aërophyte.
☞ The “Florida moss” (
Tillandsia
, many tropical orchids, and most mosses and lichens are air plants. Those which are lodged upon trees, but not parasitic on them, such as the Spanish moss
Tillandsia usneoides
), are epiphytes
.