Polemonium acutifolium - AbsoluteAstronomy.com

Polemonium acutiflorum (Tall Jacob's-ladder) is a plant of the genus Polemonium
Polemonium
Polemonium, commonly called Jacob's ladder, is a genus of about 30 species of flowering plants in the family Polemoniaceae, native to cool temperate to arctic regions of the Northern Hemisphere and also in the southern Andes in South America...

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