Plants have lived on land for more than 400 million years. The botanical garden collection includes plants from different evolutionary stages. Mosses are small, ancient plants that require moist and shady environments. Unlike mosses, ferns have true leaves and roots and move water through their veins. These features allowed them to grow as soaring forests when dinosaurs roamed the earth. Tree ferns were later replaced by plants with strong woody trunks and seeds. Wind-pollinated, cone-bearing trees like pines took over until the emergence of flowering plants, or angiosperms. Flowers were able to attract animal pollinators and make fruits to improve seed dispersal. They are the most common type of land plant today.