To date, only two studies on mosses from this park have been published. Suleiman and Akiyama (2004) reported 126 species of mosses belonging to 74 genera and 27 families, collected during the CRP Scientific Expedition in 2002 at Ulu Kimanis and adjacent areas within the elevations of 500–1,400 m a.s.l. Recently, Suleiman and Jotan (2015) reported 38 species and three varieties of mosses belonging to 17 genera and 11 families collected during a diversity study of epiphytic mosses along the Minduk Sirung Trail, a new 12 km trail connecting Mount Alab and Mahua substations (north-eastern part). In their study, mosses were collected from only three sampling areas of 20 m × 20 m.