The flora of the reserve totals 755 species of vascular plants, 89 species of bryophytes, 232 species of aquatic plants, 21 species of myxomycetes, 257 species of mushrooms, and 383 species of lichen. The reserve’s vegetation varies greatly by elevation. It can be divided into three vegetation belts, lowland (up to 900 m above sea level) and mid-range (900 m to 1400 m) and highland (above 1400 m).
Tigireksky Reserve’s primary vegetation is comprised of black taiga forest, mainly containing plants from the preglacier period, among them are tertiary relics such as sweet cicely (Osmorhiza aristata), European wild ginger (Asarum europaeum), daphne (Daphne mesereum), campanula (Campanula latifolia), Braun’s holly fern (Polystichum braunii), and Sanicula uralensis. Aspen-fir forests dominate most of the reserve, while river valleys contain fir groves, and Siberian pine-fir forests occupy the mountain taiga belt, and sparse Siberian pine-fir thin forests with areas of lichens that in areas of high humidity almost completely cover tree trunks up to 7-12 m above the ground, green “beards” overhung by branches. High altitude alpine tundra areas also contain apine meadows. At elevations of 500-900 m, there are significant areas occupied by meadow-steppe and occasional shrubby thickets.