Archegonia is found in many gymnosperms, including bryophytes, mosses, Nephrolepis, and ferns. To distinguish them from algae, which lack archegonium, these plants are referred to as archegoniate. The algae can reproduce sexually, asexually, and vegetatively. Plants reproduce through fragmentation. Every piece grows into a thallus. The most prevalent type of spore produced during asexual reproduction is called a zoospore. They are parasitized and produce new plants after germination. Through the joining of two gametes, sexual reproduction is accomplished.