epiphyte
Concise Oxford English Dictionary © 2008 Oxford University Press:
epiphyte /ˈɛpɪfʌɪt/
▶noun Botany a plant that grows non-parasitically on a tree or other plant.
– derivatives
epiphytal /-ˈfʌɪt(ə)l/ adjective,
epiphytic /-ˈfɪtɪk/ adjective.
epiphytal /-ˈfʌɪt(ə)l/ adjective,
epiphytic /-ˈfɪtɪk/ adjective.
'epiphyte' also found in these Oxford entries:

