Smith system

A system of taxonomy of the cryptogams, the Smith system was published in

Smith, G.M. (1938). Cryptogamic Botany, vol. 1. Algae and fungi. McGraw-Hill, New York.
Smith, G.M. (1955). Cryptogamic Botany, vol. 2. Bryophytes and pteridophytes. 2nd ed. McGraw-Hill, New York.

Division Chlorophyta

Further information: Chlorophyta
  • Order 5. Schizogoniales
  • Family Schizogoniaceae
  • Family Oedogoniaceae
  • Order 10. Siphonales
  • Order 11. Siphonocladiales
  • Family Characeae

Division Euglenophyta

  • Order 1. Euglenales
  • Order 2. Colaciales (Euglenocapsales)

Division Pyrrophyta

  • Order 1. Gymnodiniales
  • Order 2. Peridiniales
  • Order 3. Dinophysidales
  • Order 4. Rhyzodiniales
  • Order 5. Dinocapsales
  • Order 6. Dinotrichales
  • Order 7. Dinococcales

Division Chrysophyta

Further information: Chrysophyta
  • Order 1. Heterochloridales
  • Order 2. Rhizochloridales
  • Order 3. Heterocapsales
  • Order 4. Heterotrichales
  • Order 5. Heterococcales
  • Order 6. Heterosiphonales
  • Order 1. Chrysomonadales
  • Suborder 1. Cromulinae
  • Suborder 2. Isochrysidineae
  • Suborder 3. Ochromonadineae
  • Order 2. Rhizochrysidales
  • Order 3. Chrysocapsales
  • Order 4. Chrysotrichales
  • Order 5. Chrysosphaerales

Division Phaeophyta

  • Subclass 1. Haplostichineae
  • Subclass 2. Polystichineae

Division Cyanophyta

Division Rhodophyta

  • Subclass 1. Bangioideae
  • Order Bangiales

Division Myxothallophyta

  • Subclass 1. Endosporeae
  • Subclass 2. Exosporeae

Division Eumycetae

  • Order 2. Blastocladiales
  • Order 3. Monoblepharidales
  • Order 4. Ancylistales
  • Order 5. Saprolegniales
  • Subclass 1. Protoascomycetae
  • Subclass 2. Euascomycetae
  • Subclass 1. Eubasidii
  • Subclass 2. Hemibasidii
  • Subclass 1. Ascholichenes
  • Subclass 2. Basidiolichenes

Division Bryophyta

Further information: Bryophyta
  • Suborder 1. Metzgerineae
  • Suborder 2. Jungermannineae
  • Order 4. Calobryales
  • Order 1. Anthocerotales
  • Subclass 1. Sphagnobrya
  • Subclass 2. Andreaeobrya
  • Subclass 3. Eubrya

Division Psilophyta

  • Order 1. Psilophytales
  • Family 1. Rhyniaceae
  • Family 2. Psilophytaceae
  • Family 3. Pseudosporochnaceae
  • Family 4. Zosterophyllaceae
  • Family 5. Asteroxylaceae
  • Order 2. Psilotales

Division Lepidophyta

  • Order 1. Lycopodiales
  • Order 2. Selaginellales
  • Family 1. Selaginellaceae
  • Family 2. Miadesmiaceae
  • Family 1. Lepidodendraceae
  • Family 2. Lepidocarpaceae
  • Family 3. Bothrodendraceae
  • Family 4. Sigillariaceae
  • Family 1. Pleuromeiaceae
  • Family 2. Isoetaceae

Division Calamophyta

Division Pterophyta

  • Subclass 1. Primofilices (or Inversicatenales, Coenopterideae, Palaeopteridales)
  • Order 1. Protopteridales
  • Family 1. Protopteridaceae
  • Family 2. Cladoxylaceae
  • Order 2. Coenopteridales
  • Family 1. Zygopteridaceae
  • Family 2. Botryopteridaceae
  • Family 3. Anachoropteridaceae
  • Order 3. Archaeopteridales
  • Subclass 2. Eusporangitae
  • Subclass 3. Leptosporangiatae
  • Order 1. Filicales