There is a variety of ferns on the tree.For example, Stag horn fern, Bird nest fern and Sword fern.

Sword Fern:
Kingdom: Plantae
Division: Pteridophyta
Class: Pteridopsida
Order: Polypodiales
Family: Dryopteridaceae
Genus: Polystichum
Species: P. munitum

Staghorn Fern:
Kingdom: Plantae
Division: Pteridophyta
Class: Pteridopsida
Order: Polypodiales
(unranked): Eupolypods I
Family: Polypodiaceae
Genus: Platycerium