Here are some examples of Gymnosperms:

* Conifers: Pines, firs, spruces, cedars, redwoods, yews, and cypress trees

* Cycads: Ancient, palm-like plants with cones

* Ginkgoes: A unique tree with fan-shaped leaves

* Gnetales: A group of unusual plants including ephedra, gnetum, and welwitschia

Key characteristics of Gymnosperms and their naked seeds:

* Seeds are not enclosed in an ovary: This is the main distinction between Gymnosperms and Angiosperms (flowering plants).

* Seeds are usually borne on cones: Cones are specialized structures that protect the seeds.

* Seeds are typically exposed to the environment: This makes them more vulnerable to environmental factors like wind and animals.

* Pollen is dispersed by wind: This is a common method of fertilization in Gymnosperms.

Remember, the term "naked seeds" simply means that the seeds are not enclosed within a fruit or ovary.