Polemonium foliosissimum explained

Polemonium foliosissimum, the towering Jacob's-ladder, is a rare species of flowering plant in the phlox family Polemoniaceae, native to the western United States; Arizona, Colorado, Idaho, Nevada, New Mexico, Utah and Wyoming.^{[1] [2]} As its synonym Polemonium archibaldiae it has gained the Royal Horticultural Society's Award of Garden Merit.^[3]

Subtaxa

The following varieties are accepted:^[1]

• Polemonium foliosissimum var. alpinum Brand - Idaho, Nevada, Utah, Wyoming
• Polemonium foliosissimum var. foliosissimum - Arizona, Colorado, New Mexico, Utah

Notes and References

1. Web site: Polemonium foliosissimum A.Gray . . Plants of the World Online . Board of Trustees of the Royal Botanic Gardens, Kew . 19 May 2021 .
2. Web site: Polemonium foliosissimum . Tropicos . 2012-05-08.
3. Web site: Polemonium archibaldiae . 2021 . The Royal Horticultural Society . 19 May 2021 .