Vegetation analysis of “muyong” was done to determine the species composition and diversity of tree species in Barangays (Brgy.) Amganad and Poitan. Trees growing within the established plots (10 m x 10 m) were identified and described. Tree diameter at breast height (DBH), merchantable height, total height, and diameter of the crown were measured. Brgy. Amganad has flat to steep slopes and elevations ranging from 1120 to 1240 m above sea level (masl), with the “muyong” located at 1240 masl. On the other hand, Brgy. Poitan has flat to steep configuration and elevations ranging from 990 to 1200 masl, with the “muyong” found at 1200 masl. Vegetation was comprised of 67 species belonging to 22 families. The tree species common in the dominant layers of forest stands in both barangays (local communities) were pine (Pinus kesiya), tabangawon/tabangawen (Weinmannia luzoniensis) and palayon (Lithocarpus submonticolus). Height of dominant trees in Brgy. Amganad ranged from 14 to 20 m while that in Brgy. Poitan ranged from 17 to 30 m. “Muyong” forest in Brgy. Poitan showed higher diversity compared with the “muyong” forest in Brgy. Amganad. However, the latter had higher species evenness value. In general, species diversity in the two barangays was not very dissimilar.