Thorne system (1992)

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A modern system of plant taxonomy, the Thorne system (1992) of plant classification was drawn up by the botanist Robert F. Thorne (1920- ). He replaced it in 2000 with a new system.

The system is available online at two sites. Firstly, at the Center for the Study of Digital Libraries Texas A&M.[1] Secondly in the 1999 lecture notes by J.L. Reveal, at that time a professor at the Norton Brown Herbarium, University of Maryland [2][3][4] with an extensive listing of synonyms, both nomenclatural and taxonomic, for each name in the system). The Thorne system (1992) counts 440 families and 69 orders.

Earlier versions used the -florae suffix for superorder.[5]






  • Thorne, R.F. (1968). "Synopsis of a putative phylogenetic classification of flowering plants". Aliso 6 (4): 57–66. 
  • Thorne, R. F. (1976). A phylogenetic classification of the Angiospermae. Evolutionary Biology 9: 35–106.
  • R.F. Thorne (1992). "Classification and geography of flowering plants". Botanical Review 58 (3): 225–348. doi:10.1007/BF02858611. 
  • R.F. Thorne (1992). "An updated phylogenetic classification of the flowering plants". Aliso 13: 365–389. 
  • R.F. Thorne (2000). "The classification and geography of the flowering plants: dicotyledons of the class Angiospermae". Botanical Review 66 (4): 441–647. doi:10.1007/BF02869011. 
  • Thorne, Robert F.; Reveal, James L. (April 2007). "An Updated Classification of the Class Magnoliopsida (“Angiospermae”)". The Botanical Review 73 (2): 67–181. doi:10.1663/0006-8101(2007)73[67:AUCOTC]2.0.CO;2.