What is another word for Class Psilopsida?
Pronunciation: [klˈas sˈɪləpsˌɪdə] (IPA) 
Class Psilopsida is a group of primitive ferns that are mostly extinct. These plants are commonly referred to as whisk ferns and are found in tropical and subtropical regions. The name Psilopsida literally means "barefoot," referring to the absence of true leaves in these ferns. Synonyms for this term include lycophytes, which are similar in appearance to these primitive ferns, and rhyniophytes, a group of extinct plants that are related to ferns and had similar structures. These terms are often used interchangeably to describe these ancient plants, which played a significant role in the evolution of plant life on Earth.
