What is a non-vascular plant that produces pollen.?

A non-vascular plant that produces pollen is the clubmoss, particularly from the family Lycopodiaceae. These ancient plants, often found in moist forested areas, reproduce through spores rather than seeds, but some species have structures that produce pollen-like grains during their reproductive cycle. While they are not true flowering plants, their reproductive methods and structures are significant in understanding plant evolution.