Gymnosperms are one of two types of seed-producing plants, the other being angiosperms. Gymnosperms include conifers cycads, ginkgo, and gnetales. Gymnosperm means “naked seeds” in Greek. Their leaves are extremely variable. Cycads have leathery, feather-like leaves. Some have only two, strap like leaves. Conifers have small needle-like leaves. Gymnosperms that occupy more extreme parts of the world have heavy cuticles.