Polemoniaceae
Jacob's ladder
Polemonium caeruleum
- Family
- Polemoniaceae
- Genus
- Polemonium
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Common names
By language (29)
- Arabic
- بولامون أزرق, حشيشة العقرب, سلم يعقوب, فو رومي
- arz
- بولامون ازرق
- Azerbaijani
- Mavi göyümçiçək
- ba
- Фаягөл
- Belarusian
- Сінюха блакітная, Аструшка, Гадзіннік, Рабінка, Сінюшнік
- Chinese
- 花荵, 电灯花, 手参, 穴菜, 紫花一炷香, 鱼翅菜
- Czech
- Jirnice modrá
- Danish
- Almindelig Jakobsstige
- Dutch
- Jakobsladder
- English
- Jacob's ladder, Charity, Blue Jacob's ladder, Great valerian, Greek valerian, Jacob's-ladder
- Estonian
- Harilik sinilatv
- Finnish
- Lehtosinilatva
- French
- Polémoine bleue, Polemoine bleue, Valériane grecque
- German
- Blaue Himmelsleiter
- hsb
- Módra jěrnica
- Hungarian
- Kék csatavirág
- Japanese
- エゾノハナシノブ, ミヤマハナシノブ
- Kazakh
- Шайтанкелмес
- Korean
- 참꽃고비, 꽃고비
- Latvian
- Zilā kāpnīte
- Lithuanian
- Mėlynasis palemonas
- Norwegian
- Fjellflokk
- Norwegian Bokmål
- Fjellflokk, Jakobsstige
- Persian
- پلمونیوم کائرولئوم
- Polish
- Wielosił błękitny
- Russian
- Синюха голубая
- Slovak
- Vojnovka belasá
- Swedish
- Blågull, Blåljus, Jakobs stege
- Ukrainian
- Синюха блакитна
Synonyms
- Polemonium caeruleum f. vulgare (Ledeb.) Regel
- Polemonium caeruleum var. caeruleum
- Polemonium coeruleum subsp. vulgare Brand
- Polemonium coeruleum var. vulgare Ledeb.
- Polemonium elatum Salisb.
Flowers
- In flower
- May to July (from 984 flowering iNaturalist observations worldwide)
Characteristics
- Growth habit
- Forb/herb
- Lifespan
- Perennial
- In the US and Canada
- Canada: introduced, Lower 48 states: introduced
Photos
FlowerPhoto: Fyodor Pudovikov, CC BY 4.0, from iNaturalist 
FlowerPhoto: Oleg Kosterin, CC BY 4.0, from iNaturalist 
FlowerPhoto: Алексей Ябс, CC0, from iNaturalist 
FlowerPhoto: Евгений Маринкин, CC BY 4.0, from iNaturalist 
Photo: zebedeugalinha, CC BY 4.0, from iNaturalist 
Photo: OhWeh, CC BY-SA 2.5, from Wikimedia Commons 
Photo: amantedarmanin, CC BY 4.0, from iNaturalist 
Photo: Colin grice, CC BY-SA 3.0, from Wikimedia Commons 
Photo: Ryan Hodnett, CC BY-SA 4.0, from Wikimedia Commons 
Photo: Patrick Schwager, CC BY 4.0, from iNaturalist 
Photo: Tatiana Strus, CC BY 4.0, from iNaturalist 
Photo: Илья Руденко, CC BY 4.0, from iNaturalist
More in Polemonium
- 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
- Towering Jacob's-ladderPolemonium foliosissimumPolemoniaceae
- 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.