There is no such thing as a "seedless vascular plant". This is because the terms "seedless" and "vascular" refer to two distinct characteristics of plants, and they are not mutually exclusive.

Let's break down the terms:

* Vascular plants: These plants have a specialized vascular system, composed of xylem and phloem, that transports water and nutrients throughout the plant. Examples of vascular plants include ferns, horsetails, club mosses, and all trees and flowering plants.

* Seedless plants: These plants reproduce without seeds. Instead, they rely on spores for reproduction. Examples of seedless plants include ferns, horsetails, and club mosses.

Therefore, all seedless plants are also vascular plants.

The confusion might arise because seedless vascular plants are often grouped together as a separate category, but this is simply a way to classify them based on their lack of seeds. They are still vascular plants, meaning they possess the characteristic vascular system.