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Wisconsin State Herbarium is Collecting Voucher Specimen!

A herbarium voucher, a physical pressed specimen, provides verifiable and permanent records of species’ occurrences through time and space. Herbarium records are essential for management and biological research, with a large range of utility from tracking historical distributions, understanding modes of dispersal, studying climate change, and are essential for accurate identification and nomenclature. Although many invasive species are reported in counties across the state, associated herbarium records are often lacking.

Although a properly prepared specimen by use of a plant press is best (, gathered plant material can also be pressed simply between a sheet of newspaper inside a heavy book, such as a phone book. Be sure to collect any flowers and/or fruits along with vegetative materials.

Note the following information and submit with your specimen:

  • date of collection
  • detailed geographical data (lat/long coordinates and specific locality)
  • ecological data (habitat, size of population, co-occurring species)

Please send specimens to:
Wisconsin State Herbarium
Department of Botany, 160 Birge Hall
430 Lincoln Drive
Madison, WI 53706

You are donating to : The Invasive Plants Association of Wisconsin, a non-profit organization, making your donation tax deductible.

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