In pteridophytes, spores are generally of similar kinds, but some genera produce two different kinds of spores (macro and micro spores). Which of the following is a heterosporous pteridophyte?

Step-by-step solution

Pteridophytes are generally homosporous, meaning they produce only one kind of spore. Examples of homosporous pteridophytes include Dryopteris, Lycopodium, and Adiantum. Genera like Selaginella and Salvinia produce two kinds of spores, macro (large) and micro (small) spores. Such plants are known as heterosporous. Therefore, Salvinia is the correct answer. Answer: Salvinia