Thorne system

A system of plant taxonomy, the Thorne system of plant classification was devised by the American botanist Robert F. Thorne (1920–2015) in 1968,[1] and he continued to issue revisions over many years (1968–2007).[1][2][3][4][5][6][7][8]

Some versions of the system are available online. The Bioinformatics Working Group Center for the Study of Digital Libraries at Texas A&M University lists the March 1999 version[9] (and other classification systems).[10] James Reveal's course lecture notes (1999) also gives an account of the Thorne system at that time, with an extensive listing of synonyms, both nomenclatural and taxonomic, for each name in the system[11] together with several other classification systems.[12]

For a discussion of the various suffixes used for superorders (-florae vs. -anae), see Brummitt 1992,[13] and Thorne 1992.[5] In this latter paper, Thorne sets out his reasons for abandoning -florae for -anae, following contemporary practice.

1968 System

Monocotyledons

Superorders

1992 System

The 1992 system lists 69 orders and 440 families

Summary

Magnoliidae

Liliidae

2007 System

The 2007 system lists 12 subclasses, 35 superorders, 87 orders, 40 suborders, and 472 families. It uses the suffixes given in the following example.

Class Magnoliopsida ("Angiospermae") - 12 subclasses

  • Subclass Magnoliidae
    • Superorder: Magnolianae
      • Order: Magnoliales
        • SubOrder: Magnoliineae
          • Family: Magnoliaceae
            • SubFamily: Magnolioideae
              • Tribe: Magnolieae
Subclasses (12)

Note: Monocotyledons are represented here by 3 separate subclasses 3–5[14]

References
  1. Thorne 1968.
  2. Thorne 1976.
  3. Thorne 1977.
  4. Thorne 1983.
  5. Thorne 1992a.
  6. Thorne 1992b.
  7. Reveal 1999a.
  8. Thorne & Reveal 2007.
  9. Robert F. Thorne. 1992. Classification and Geography of Flowering Plants. Botanical Review 58: 225-348 as updated December, 1992 and March, 1999. Source for March 1999 in Reveal (1999a)
  10. Texas A&M Flowering Plant Gateway
  11. Reveal 1999b.
  12. Reveal 1999c.
  13. Brummitt 1992, pp. 770–776.
  14. Singh 2019, p. 260.

Bibliography
  • Reveal, James (22 November 1998). "Lists of the Flowering Plant Taxa Accepted by Cronquist, Dahlgren, Reveal, Takhtajan & Thorne". Vascular Plant Family Nomenclature. University of Maryland: Norton-Brown Herbarium. Retrieved 3 January 2016.
  • Reveal, James L (29 March 1999a). "An updated classification of the Monocotyledoneae by Robert F Thorne". Plant Biology. University of Maryland: Norton-Brown Herbarium. Retrieved 4 January 2016.
  • Reveal, James L (1999b). "Thorne System of Angiosperm Classification". Plant systematics.org. University of Maryland: Norton-Brown Herbarium. Retrieved 4 January 2016.
  • Reveal, James L (1999c). "PBIO250 Lecture Notes. Plant Taxonomy: Systems of Vascular Plant Classification". Plant systematics.org. University of Maryland: Norton-Brown Herbarium. Retrieved 4 January 2016.
  • Brummitt, R.K. (1992). Vascular plant families and genera : a listing of the genera of vascular plants of the world according to their families, as recognised in the Kew Herbarium, with an analysis of relationships of the flowering plant families according to eight systems of classification. Kew: Royal Botanic Gardens. ISBN 9780947643430.
  • Singh, Gurcharan (2019) [2004]. Plant Systematics: An Integrated Approach (4th ed.). CRC Press. ISBN 978-1-00-057677-1.

Works by Thorne

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