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[edit]

Summary[edit]

Magnoliidae (Dicotyledons)[edit]

1982 system (Monocotyledons)[edit]

Summary[edit]

6 Superorders

Details[edit]

1985 system (Monocotyledons)[edit]

Summary[edit]

10 superorders

Details[edit]

Liliiflorae[edit]

Ariflorae[edit]

Triuridiflorae[edit]

Alismatiflorae[edit]

Bromeliiflorae[edit]

Zingiberiflorae[edit]

Commeliniflorae[edit]

Cyclanthiflorae[edit]

Areciflorae[edit]

Pandaniflorae[edit]

Notes[edit]

References[edit]

Bibliography[edit]

Note: This is a selected list of the more influential systems. There are many other systems, for instance a review of earlier systems, published by Lindley in his 1853 edition, and Dahlgren (1982). Examples include the works of Scopoli, Batsch and Grisebach.