en.wikipedia.org
en.wikipedia.org
plants.usda.gov
USDA Plants Database
https://plants.usda.gov › DocumentLibrary › plantguide › pdf › pg_vedu.pdf
nwcb.wa.gov
Washington State Noxious Weed Control Board
https://www.nwcb.wa.gov › weeds › ventenata
fs.usda.gov
US Forest Service
https://www.fs.usda.gov › pnw › sciencef › scifi260.pdf
extension.sdstate.edu
fieldguide.mt.gov
Montana Field Guide
https://fieldguide.mt.gov › speciesDetail.aspx?elcode=PMPOA6D010
naisma.org
cabidigitallibrary.org
CABI Digital Library
https://www.cabidigitallibrary.org › doi › 10.1079 › cabicompendium.117772
en.wikipedia.org
gobotany.nativeplanttrust.org
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