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Viburnum Leaf Beetle
Guide to identifying viburnums

Is it a viburnum?

Viburnum leaf
beetle home


Guide to identifying Viburnums

  • Common names


  • Is it a viburnum?


  • Which viburnum?


  • Express key


  • ID tutorial


  • Guide to viburnums by David Swaciak.

    Leaf drawings by
    Marcia Eames-Sheavly.

    Logo images by Paul Weston & Craig Cramer

    Carefully make a long tapered cut in the twig.

    6A1. If the inside of the stem is hollow or chambered, you do not have a viburnum.
    Forsythia chambered pith.
    Click for larger image.
    6A2. If the inside of the stem is solid (continuous), go to 7. V. dilatatum chambered pith.
    Click for larger image.


    Tip: Chambered pith is just what it sounds like. Small partitions divide the center of the stem into little chambers. See this sketch or photograph.

    If you chose 6A1 above, your plant is most likely a forsythia (Forsythia sp.) or honeysuckle (Lonicera sp.). Most forsythia have chambered or hollow pith (though the pith is solid at the nodes) and some honeysuckles have hollow pith.

    More information and pictures about
    Forsythia x intermedia: Cornell | UConn

    More information and pictures about
    Lonicera tatarica: Cornell | UConn

    Search Cornell or UConn for information
    on other Forsythia or Lonicera species.


    Copyright, Department of Horticulture, Cornell University.

    Project coordinator: Lori Brewer, ljb7@cornell.edu
    Website design: Craig Cramer cdc25@cornell.edu

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