DENDROLOGY

Detailed explanation-1: -Historically both lycophytes and monilophytes were grouped together as pteridophytes (ferns and fern allies) on the basis of being spore-bearing ("seed-free").

Detailed explanation-2: -Seedless non-vascular plants all fall into the group Bryophyta, a group of plants that are the closest extant relative of early terrestrial plants. The first bryophytes (liverworts) most likely appeared about 450 million years ago.