University of Colorado... botanydb.colorado.edu

If You're Not Growing... www.finegardening.com

Geum x heldreichii... shop.stauden-kirschenlohr.d...

Geum x heldreichii... shop.stauden-kirschenlohr.d...

List of Geum species -... en.wikipedia.org

2013 BONAP North American... bonap.net

Geum xhainesianum... bioone.org

2013 BONAP North American... bonap.net

Geum Coccineum Red Avens... www.dreamstime.com

World Plants: Plant List www.worldplants.de

Perennials F-G at Digging... www.diggingdog.com

Geum | Vertigrow www.vertigrow.co.uk

Geum 'Prinses Juliana'... www.alamy.com

Geum Lady Stratheden Seeds... www.plant-world-seeds.com

avens (Genus Geum) ·... uk.inaturalist.org

Amazon.com : Geum coccineum... www.amazon.com

Geum rivale L. - Purple... luirig.altervista.org

North American Native... botany.thismia.com

List of Geum species -... en.wikipedia.org

Geum rivale L. - Purple... luirig.altervista.org