Lava flows from Newberry display varied vegetation cover, and there are variable levels of flora between flows, though the level of vegetation and species diversity generally increase with elevation. Dominant plant species on lava flows include oceanspray and wax currant, with rabbitbrush also common. Though forbs are not widespread on the lava flows, where they do occur Davidson's penstemon and hotrock penstemon dominate. Above elevations of , roundleaf alumroot is common, particularly near the edges of lava flows. All lava flows support patches of grasses such as Idaho fescue, especially on north-facing slopes. One lava flow at Lava Butte is barren except for scattered, dense patches of greenleaf manzanita.