Dahlgren system

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One of the modern systems of plant taxonomy, the Dahlgren system was published by monocot specialist Rolf Dahlgren in 1975[1] and revised in 1977,[2] and 1980.[3] However, he is best known for his two treatises on monocotyledons in 1982 [4] and revised in 1985.[5] His wife Gertrud Dahlgren continued the work after his death.[6]

Dahlgren ranked the dicotyledons and monocotyledons as subclasses of the class of flowering plants (angiosperms) and further divided them into superorders. Originally (1975) he used the suffix -anae, as did Cronquist, to designate these, but in 1980 changed this to -florae in accordance with Thorne. In the 1989 revision, published by his wife, the alternate names Magnoliidae and Liliidae were dropped in favour of Dicotyledon and Monocotyledon, and the suffix -florae reverted to -anae (e.g. Alismatanae for Alismatiflorae).

Reveal provides an extensive listing of Dahlgren's classification.[7] (Note the synonyms, both nomenclatural and taxonomic, for each name in the system.)

1980 system

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Summary

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Magnoliidae (dicotyledons)

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1982 system (monocotyledons)

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Summary

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Six superorders

Details

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1985 system (monocotyledons)

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Summary

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Ten superorders

Details

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Liliiflorae

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Ariflorae

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Triuridiflorae

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Alismatiflorae

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Bromeliiflorae

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Zingiberiflorae

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Commeliniflorae

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Cyclanthiflorae

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Areciflorae

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Pandaniflorae

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Notes

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References

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  1. ^ Dahlgren 1975.
  2. ^ Dahlgren 1977.
  3. ^ Dahlgren 1980.
  4. ^ Dahlgren & Clifford 1982.
  5. ^ Dahlgren, Clifford & Yeo 1985.
  6. ^ Dahlgren 1989.
  7. ^ JL Reveal:Dahlgren System of Angiosperm Classification 1997

Bibliography

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