Plants are a major group of living things (about 300,000 species),
including familiar organisms such as trees, flowers, herbs, and ferns.
Aristotle divided all living things between plants, which generally do
not move or have sensory organs, and animals. In Linnaeus� system,
these became the Kingdoms Vegetabilia (later Plantae) and Animalia.
Since then, it has become clear that the Plantae as originally defined
included several unrelated groups, and the fungi and several groups of
algae were removed to new kingdoms. However, these are still often
considered plants in many contexts. Indeed, any attempt to match
�plant� with a single taxon is doomed to fail, because plant is a vaguely
defined concept unrelated to the presumed phylogenic concepts on
which modern taxonomy is based.