Polemoniaceae
Towering Jacob's-ladder
Polemonium foliosissimum
- Family
- Polemoniaceae
- Genus
- Polemonium
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Common names
By language (3)
- English
- Towering Jacob's-ladder
- Icelandic
- Klukkustigi
- nv
- Azeeʼ naachiiʼ
Synonyms
- Polemonium foliosissimum subsp. verum Wherry
Flowers
- In flower
- June to July (from 188 flowering iNaturalist observations worldwide)
Characteristics
- Growth habit
- Forb/herb
- Lifespan
- Perennial
- In the US and Canada
- Lower 48 states: native
Photos
FlowerPhoto: Anders Hastings, CC BY 4.0, from iNaturalist 
FlowerPhoto: Anders Hastings, CC BY 4.0, from iNaturalist 
FlowerPhoto: Parker James Lloyd, CC BY 4.0, from iNaturalist 
FlowerPhoto: Michael, Antoni and Nihat Hinczewski, CC BY 4.0, from iNaturalist 
Photo: JerryFriedman, CC BY-SA 3.0, from Wikimedia Commons 
Photo: Matt Berger, CC BY 4.0, from iNaturalist 
Photo: Kurt Stüber [1], CC BY-SA 3.0, from Wikimedia Commons 
Photo: Grant Chovil, CC BY 4.0, from iNaturalist 
Photo: Kurt Stüber [1], CC BY-SA 3.0, from Wikimedia Commons 
Photo: crothfels, CC BY 4.0, from iNaturalist 
Photo: Kurt Stüber [1], CC BY-SA 3.0, from Wikimedia Commons 
Photo: James Fowler, CC BY 4.0, from iNaturalist
More in Polemonium
- Jacob's ladderPolemonium caeruleumPolemoniaceae
- Greek valerianPolemonium reptansPolemoniaceae
- Northern Jacob's-ladderPolemonium borealePolemoniaceae
- Jacob's-ladderPolemonium pulcherrimumPolemoniaceae
- Sticky polemoniumPolemonium viscosumPolemoniaceae
- Elegant Jacob's-ladderPolemonium elegansPolemoniaceae
- Tall Jacob's-ladderPolemonium villosumPolemoniaceae
- Fewflower Jacob's-ladderPolemonium pauciflorumPolemoniaceae
- Vanbrunt's polemoniumPolemonium van-bruntiaePolemoniaceae
- Brandegee's Jacob's-ladderPolemonium brandegeeiPolemoniaceae
- Royal Jacob's-ladderPolemonium carneumPolemoniaceae
- SkypilotPolemonium eximiumPolemoniaceae
Sources: classification, synonyms from World Flora Online Plant List (2026-06, CC0 1.0); common names, popularity from Wikidata (2026-10-26, CC0 1.0); common names, US characteristics from USDA PLANTS Database (2025-05-29, CC0 1.0). About our plant data.