Thorne system (1992).html
 
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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. These two systems were published in:

  • R.F. Thorne (1968). "Synopsis of a putative phylogenetic classification of flowering plants". Aliso 6(4): 57–66. 
  • R.F. Thorne (1992). "Classification and geography of flowering plants". Botanical Review 58: 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: 441–647. doi:10.1007/BF02869011. 

The system is available online at two sites. Firstly, at the Center for the Study of Digital Libraries Texas A&M (CSDL, Texas). Secondly in the 1999 lecture notes by J.L. Reveal, at that time a professor at the Norton Brown Herbarium, University of Maryland (1, 2, 3; with an extensive listing of synonyms, both nomenclatural and taxonomic, for each name in the system). According to the latter site the main groups in the system are:

The Thorne system (1992) counts 440 families and 69 orders:
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