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 4-5 species each year.

2020 Call for New Weed Observations

Data reporting methods:

We encourage participants to adopt our 4-County CWMA invasive plant observation data standards for your contributions. You can submit your weed observations on a number of different online and mobile platforms, such as:

  • iMapInvasives Oregon
  • iNaturalist
    • Observations can also be sent to the iNaturalist project, 4-County CWMA New Weeds (courtesy of Lindsey Wise).
    • If you’d like to learn more about iNaturalist, check out this how-to guide.
  • EDDMapS West
    • Within Washington State, please send reports to EDDMapS. They also have a mobile app!
    • This platform accepts individual observations and bulk uploads.
  • Oregon Invasive Species Hotline
  • WeedMapper
    • If you’d like to learn more about ODA’s WeedMapper, check out this handy quick start guide.
    • WeedMapper reports automatically get integrated into the iMapInvasives Oregon dataset.

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:

  • 2019–There was no Call for Observations in 2019.
  • 2018 Species List
    • drooping sedge (Carex pendula)
    • greater celandine (Chelidonium majus)
    • wild basil (Clinopodium vulgare)
    • Balfour’s balsam (Impatiens balfourii)
    • orange cotoneaster (Cotoneaster franchetii)
  • 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: