About Polemonium foliosissimum A.Gray
Polemonium foliosissimum, commonly known as towering Jacob's-ladder, is a rare flowering plant species belonging to the phlox family, Polemoniaceae. It is native to the western United States, specifically found in Arizona, Colorado, Idaho, Nevada, New Mexico, Utah and Wyoming. Under its synonym Polemonium archibaldiae, this plant has been awarded the Royal Horticultural Society's Award of Garden Merit.