en.wikipedia.org
en.wikipedia.org
cal-ipc.org
California Invasive Plant Council
https://www.cal-ipc.org › plants › profile › centaurea-solstitialis-profile
fs.usda.gov
invasivespeciesinfo.gov
National Invasive Species Information Center (NISIC)
https://www.invasivespeciesinfo.gov › terrestrial › plants › yellow-star-thistle
plants.usda.gov
USDA Plants Database
https://plants.usda.gov › DocumentLibrary › plantguide › pdf › pg_ceso3.pdf
cabidigitallibrary.org
CABI Digital Library
https://www.cabidigitallibrary.org › doi › 10.1079 › cabicompendium.12043
plants.ces.ncsu.edu
North Carolina Extension Gardener Plant Toolbox
https://plants.ces.ncsu.edu › plants › centaurea-solstitialis
powo.science.kew.org
Plants of the World Online
https://powo.science.kew.org › taxon › urn:lsid:ipni.org:names:191626-1
southwestdesertflora.com
permalogica.com
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