Plants Used By People

Land plants, also known as Embryophyta or Metaphyta. - Plantae sensu strictissimo - This group includes the liverworts, hornworts, mosses, and vascular plants, as well as fossil plants similar to these surviving groups.
Green plants - also known as Viridiplantae, Viridiphyta or Chlorobionta - Plantae sensu stricto - Includes the land plants plus Charophyta (i.e. stoneworts), and Chlorophyta (i.e., other green algae such as sea lettuce). Viridiplantae encompass a group of organisms that possess chlorophyll a and b, have plastids that are bound by only two membranes, are capable of storing starch, and have cellulose in their cell walls.
Archaeplastida, Plastida or Primoplantae - Plantae sensu lato - Comprises the green plants above plus Rhodophyta (red algae) and Glaucophyta (glaucophyte algae). This clade includes the organisms that eons ago acquired their chloroplasts directly by engulfing cyanobacteria.