What are vascular and nonvascular plants?

What is a the same between vascular and nonvascular plants? What are two differences?Thks?

• I don't want to know that they are both plants, please be descriptive. Please don't just tell me that they both need water etc.

• Answer:

  According to http://en.wikipedia.org/wiki/Vascular_plant : "The vascular plants (also known as tracheophytes or higher plants) are those plants that have lignified tissues for conducting water, minerals, and photosynthetic products through the plant. Vascular plants include the ferns, clubmosses, flowering plants, conifers and other gymnosperms. Scientific names for the group include Tracheophyta and Tracheobionta, but neither name is very widely used." According to http://en.wikipedia.org/wiki/Non-vascular_plant : "Non-vascular plants is a general term for those plants (including the green algae) without a vascular system (xylem and phloem). Although non-vascular plants lack these particular tissues, a number of non-vascular plants possess tissues specialized for internal transport of water." "Non-vascular plants have no roots, stems, or leaves, since each of these structures is defined by containing vascular tissue. The lobes (rounded parts) of the liverwort may look like leaves, but they are not true leaves because they have no xylem or phloem. Likewise, mosses and algae have no such tissues." Any general plant characteristic that isn't listed in those difference is probably the same between the two types of plants. The primary differences are listed in the quotes.