Dahlgren system

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

Summary

Magnoliidae (dicotyledons)

1982 system (monocotyledons)

Summary

Six superorders

Details

1985 system (monocotyledons)

Summary

Ten superorders

Liliiflorae

Ariflorae

Triuridiflorae

Alismatiflorae

Bromeliiflorae

Zingiberiflorae

Commeliniflorae

Cyclanthiflorae

Areciflorae

Pandaniflorae

Notes

    References
    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
    • Dahlgren, Gertrud (July 1989). "An updated angiosperm classification". Botanical Journal of the Linnean Society. 100 (3): 197–203. doi:10.1111/j.1095-8339.1989.tb01717.x.
    • Dahlgren, R. (1975). "A system of classification of angiosperms to be used to demonstrate the distribution of characters". Botaniska Notiser. 128: 119–147.
    • Dahlgren, Rolf (1977). A commentary on a diagrammatic presentation of the angiosperms in relation to the distribution of character states. pp. 253–284., in Kubitzki (1977)
    • Kubitzki, Klaus, ed. (1977). Flowering Plants : Evolution and classification of higher categories. Symposium, Hamburg, September 8–12, 1976. Plant Systematics & Evolution - Supplementum 1. Wien: Springer. p. 416. ISBN 978-3-211-81434-5. Retrieved 13 August 2015.
    • Dahlgren, R. M. T. (February 1980). "A revised system of classification of the angiosperms". Botanical Journal of the Linnean Society. 80 (2): 91–124. doi:10.1111/j.1095-8339.1980.tb01661.x.
    • Dahlgren, Rolf; Clifford, H. T. (1982). The monocotyledons: A comparative study. London and New York: Academic Press.
    • Dahlgren, R.M.; Clifford, H.T.; Yeo, P.F. (1985). The families of the monocotyledons. Berlin: Springer-Verlag. ISBN 978-3-642-64903-5. Additional excerpts
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