At Mt Silisili, cloud forest occur above 1200m elevation. The Savaiʻi forest is dominated by a 15 to 20 m high canopy of Dysoxylum huntii, Omalanthus acuminatus, Reynoldsia pleiosperma and Weinmannia samoense. Other common trees include Coprosma savaiiense, Psychotria xanthochlora, Spiraeanthemum samoense and Streblus anthropophagorum. There are nearly 500 species of flowering plants and about 200 species of ferns in Samoa, making it richer than that of any tropical Polynesian island other than those in the Hawaiian archipelago. About 25% of the species are endemic to Samoa.