Lycopodium, also known as club mosses, produce homosporous spores. This means they produce only one type of spore, which is capable of developing into both male and female gametophytes.

Let me explain further:

* Homosporous: This refers to plants that produce only one type of spore. This spore can develop into a bisexual gametophyte, meaning it can produce both male and female gametes.

* Heterosporous: In contrast, heterosporous plants produce two distinct types of spores: microspores (male) and megaspores (female).

Lycopodium, despite being part of the ancient lineage of vascular plants, are homosporous, a trait more common in less evolved plant groups like mosses and ferns.