The plant life in the majority of the park consists mostly of alpine plants. Between 1,300 m and 1,900 m and in the valleys, the vegetation is predominately snow tussock grassland, as well as golden speargrass, large mountain daisies/tikumu (Celmisia semicordata, Celmisia coriacea), and Mount Cook lily, (Ranunculus lyallii), the largest buttercup in the world. All of these plants flower in the warmer months from November to February - early in the season in the valley floors, and late at higher altitudes. At the highest rocks of Aoraki / Mount Cook, around 14 species of lichen have been found.