Genera like Selaginella and Salvinia produce two kinds of spores. Such plants are known as :

Plants can be classified by the type of spores they produce.

If a plant produces only one kind of spore that develops into a bisexual gametophyte, it is called homosporous.

If a plant produces two distinct types of spores—small microspores that give rise to male gametophytes and larger megaspore that develop into female gametophytes—it is called heterosporous.

The genera Selaginella (a lycophyte) and Salvinia (a fern) each generate both microspores and megaspores. This dual‑spore production matches the definition of heterospory.

Therefore, such plants are correctly described as heterosporous.