Call for New Weed Observations

Please submit observations of newly establishing or expanding invasive or naturalized weed species within the 4 County CWMA region. This data is used to inform risk assessments for these species and for many other purposes. Some of these species have already been nominated for noxious weed status and are on ODA’s monitor list and others are under consideration for nomination.

We encourage and accept data on all invasive and naturalizing species.  However, to increase our impact, we highlight approximately five species each year.

Within Oregon please contribute data to iMapInvasives Oregon. Within Washington State please send reports to EDDMaps.  Both platforms accept individual observations and bulk uploads. iNaturalist.org and Oregon Invasive Species Hotline reports automatically get integrated into the iMapInvasives Oregon dataset. We encourage the adoption of our 4CCWMA invasive plant observation data standards for your contributions.

Please also consider reviewing Oregon Department of Agriculture’s current watch list and submitting supporting information about infestations to inform formal noxious weed risk assessments. Also consider nominating species for noxious weed status.

For new county records of these species, please consider vouchering populations to support taxonomic, mapping, and floristic analysis based on voucher data rather than observation data. We recommend submitting vouchers to each of the following herbariums: Portland State University Herbarium (HPSU), Oregon State University Herbarium (OSC), and the University of Washington Herbarium (WTU). Vouchering instructions for each institution are available (HPSU, OSC, WTU).

New Weeds Call for Observations Species list archive:

  • 2017 Species list
    • drooping sedge (Carex pendula)
    • greater celandine (Chelidonium majus)
    • wild basil (Clinopodium vulgare)
    • Balfour’s balsam (Impatiens balfourii)
    • ventenata grass (Ventenata dubia)
      • Removed from 2018 list because this species has a well established invasive reputation. It is a listed noxious weed in Washington State. However, its distribution in the 4CCWMA area is still poorly documented.
  • 2016 Species list
    • drooping sedge (Carex pendula)
    • greater celandine (Chelidonium majus)
    • wild basil (Clinopodium vulgare)
    • Balfour’s balsam (Impatiens balfourii)
    • Impatiens bicolor
      • Removed from 2017 list. Very limited in our area. The focus of this list has shifted away from extremely rare weeds.
    • ventenata grass (Ventenata dubia)
    • Evergreen bugloss (Pentaglottis sempervirens)
      • Removed from 2017 list because increased documentation was accomplished. Species should still be considered for risk assessment with collected data.

ODA Watch list archive: