Ginkgo trees, conifers, bennettites, horsetails, ferns and cycads were plentiful during this period. On land, dinosaurs roamed among cycads and conifers. The terrestrial flora included plants such as conifers, cycads, and ginkgoes. At Lulworth Cove there is a fossil forest of conifers, tree-ferns and cycads. Excellent specimens of palms, cycads and ferns are found throughout the manicured grounds. Their diet likely consisted of ferns, cycads, and angiosperms. In the subtropical zone, mangroves, cycads and tree ferns can be found. The presence of ferns, cycads, and horsetails indicates a generally humid climate. Other plants, such as ginkgoes, cycads, and ferns were also common. Gymnosperms, such as conifers, cycads, "Ginkgo", and gnetophytes are seed-producing plants with open seeds. Gymnosperms present in Australia include the cycads and conifers. The first modern trees (conifers, ginkgos and cycads) appeared in the Permian. Many palms (notably the feather palms) and most cycads and grevilleas have pinnately divided leaves. Their diet included seeds of cycads, Ginkgo or similar plants. Sago produced from cycads must be detoxified before consumption.