Claim: Selaginella erythropus is a plant in the Selaginellacea family and is a species of spike moss, which is also called clubmoss, and is related to ferns.
Evidence: Selaginella erythropus is a species of plant in the Selaginellaceae family, endemic to Tanzania, and the Yucatan and Belize to Colombia. It is a species of spike moss (also known as clubmoss) which is related to the fern family. Family: Selaginellaceae