All specimens of mosses from the following 12 localities within the park were examined and identified. Areas covered are Inobong Visitor and Research Station, Mount Alab, Mile 32-Longkogungan Village, Longkogungan-Kuyungon Village, Salt Trail, Mahua Substation, Mount Minduk Sirung, CRP Headquaters, Ulu Senagang Substation, Melalap Substation, Ulu Membakut Substation and Ulu Kimanis Substation (Figure 1). These localities range from lowland to upper montane forests, covering secondary to primary forests, from 50 m to 2,000 m a.s.l. Details of the collection localities are listed in Table 1. Identified specimens were deposited at BORH and a set of duplicates were sent to the Herbarium of Sabah Park (SNP). Some duplicates were also deposited at HYO, Herbarium of University of Malaya (KLU) and Herbarium of Royal Botanic Gardens Victoria (MEL).