en.wikipedia.org
en.wikipedia.org
missouribotanicalgarden.org
Missouri Botanical Garden
https://www.missouribotanicalgarden.org › PlantFinder › PlantFinderDetails.aspx?taxonid=298772
pfaf.org
Plants For A Future
https://pfaf.org › user › Plant.aspx?LatinName=Pseudolysimachion+longifolium
gobotany.nativeplanttrust.org
rhs.org.uk
pfaf.org
Plants For A Future
https://pfaf.org › user › Plant.aspx?LatinName=Veronica+longifolia
powo.science.kew.org
Plants of the World Online
https://powo.science.kew.org › taxon › urn:lsid:ipni.org:names:808506-1
garden.org
The National Gardening Association
https://garden.org › plants › view › 87034 › Speedwell-Veronica-longifolia
robsplants.com
Rob's plants
www.robsplants.com › plants › VeronLongi.php
worldfloraonline.org
World Flora Online
https://www.worldfloraonline.org › taxon › wfo-0000474934
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