 Spruce-fir forests cover more than sixty percent of the naturally vegetated habitats in the park.Other coniferous forest plants include dewdrop, mountain holly, pinesap, one-flowered pyrola, shinleaf, trailing arbutus, northern woodsorrel, and drooping woodreed.An invasive insect known as the red pine scale was confirmed on dying red pines on the south side of Norumbega Mountain near Lower Hadlock Pond in 2014.