The term 'PLANT THAT REPRODUCES BY SPORES' can be summarized by the four-letter word 'FERN'. Ferns are a type of plant that reproduce by releasing spores, which are tiny reproductive cells that are released into the air and can travel long distances. Ferns are one of the oldest living plants on Earth, and they have been around for millions of years. They are found in many different climates and habitats, and they come in a variety of shapes and sizes.