Current definitions of the plant kingdom ("Plantae") offer a biological example of when such phrases might be used. One definition of "Plantae" is that it consists of all green plants (comprising green algae and land plants), all red algae and all glaucophyte algae. A stricter definition excludes the red and glaucophyte algae; the group defined in this way could be called "Plantae in sensu stricto". An even stricter definition excludes green algae, leaving only land plants; the group defined in this way could be called "Plantae in sensu strictiore".