The gametangiophores of mosses elevate archegonia and antheridia, derived from hypodermal initials, so that sperm cells can reach eggs. The strobili of the genus Equisetum and the genus Lycopodium differ in one very fundamental way. Equisetum is physiologically heterosporous. Imagine that all the spores produced by a plant washed below ground and lived long enough to produce eggs and sperm. Explain your answer.
Ferns have very distinctive reproductive structures borne on the abaxial surface of there leaves.
In answering this question you should tell what the distinguishing features of a fern are and how botanists distinguish between tleaf and stem. This page was created by Tom Silva.