The Plants

Gymnosperms were relatively diverse during the Jurassic period. The Conifers, in particular, dominated the flora, as during the Triassic; they were the most diverse group and constituted the majority of large trees. The enormous sauropods likely devoured tremendous amounts of foliage each day, probably mainly these conifers.

Other land plants included Ginkgophytes (like Ginkgos), club mosses, horsetails, ferns, seed ferns, Sphenopsids (like Neocalamites), Filincophyta (like Matonidium), Cycadeodia (like Otozamites, Ptilophyllum, and Cycadeoidea), and cycadophytes.

The many smaller and medium-sized dinosaurs that lived during this time, such as the Stegosaurus, would have browsed on low-lying plants, like seed ferns, ferns, horsetails, club mosses, and low-lying conifers.

Flowering plants first evolved during the late Jurassic period. This development would soon change the face of the Earth.

In the oceans, modern coralline algae appeared for the first time. However, they were a part of another major extinction that happened within the next major time period.