section_path: Evolution/Diversity
section_name: Diversity
paragraph_text: Diversity
  
  There are about 382,000 accepted species of plants, of which the great majority, some 283,000, produce seeds. The table below shows some species count estimates of different green plant (Viridiplantae) divisions. About 85–90% of all plants are flowering plants. Several projects are currently attempting to collect records on all plant species in online databases, e.g. the World Flora Online.
  
  Plants range in scale from single-celled organisms such as desmids (from 10 micrometres across) and picozoa (less than 3 micrometres across), to the largest trees (megaflora) such as the conifer Sequoia sempervirens (up to 380 feet (120 m) tall) and the angiosperm Eucalyptus regnans (up to 325 feet (99 m) tall).
  
  The naming of plants is governed by the International Code of Nomenclature for algae, fungi, and plants and the International Code of Nomenclature for Cultivated Plants.