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[[File:Jacob's Ladder or Greek valerian (Polemonium caeruleum).jpg|thumb|right|''Polemonium caeruleum'']]
'''Polemonium caeruleum''' is a hardy perennial flowering plant. The plant produces cup-shaped, lavender-coloured or white flowers. It is native to temperate regions of Europe.
==Uses==
{{Uses|Headaches}}, {{Uses|Fever}}, {{Uses|Epilepsy}}, {{Uses|Nervous complaints}}, {{Uses|Trembling}}, {{Uses|Palpitations of the heart}}, {{Uses|Vapours}}, {{Uses|Hysteric cases}}, {{Uses|Epilepsies}}.
==Parts Used==
==Chemical Composition==
Contains volatile oils, flavonoids, apigenin, luteolin, quercetin, kaempferol, tiliroside, triterpene glycosides including euscapic acid and tormentic acid, phenolic acids, and 3%–21% tannins.<ref name="chemical composition"/>
==Common names==
==Identification==
===Leaf===
{{Leaf|Simple|alternateAlternate|The leaves are compound i.e made up of two or more discrete leaflets}}<ref name="Leaf"/>
===Flower===
{{Flower|Unisexual|2-4cm long|blue Blue to purple|5|The flower is radially symmetrical}}
===Fruit===
{{Fruit|General|7–10 mm|The fruit is dry and splits open when ripe||manyMany}}
===Other features===
==How to plant/cultivate==
A very easily grown plant, it prefers a moist well-drained fertile soil in sun or semi-shade.<ref name="How to plant/cultivate"/>
==Commonly seen growing in areas==
<gallery class="left" caption="" widths="140px" heights="140px">
Colourful8.jpg
Flower Rex 16.jpg
Himmelsleiter Polemonium caeruleum nahe Dietfurt-001.jpg
Jacob's Ladder or Greek valerian (Polemonium caeruleum).jpg
Polemonium caeruleum (white flowers).jpg
Polemonium caeruleum - GBA Viote 09-16.jpg
Polemonium caeruleum - img 02547.jpg
Polemonium caeruleum - RNN Lac de Remoray.jpg
</gallery>
<references>
<ref name="chemical composition">[https://www.sciencedirect.com/science/article/pii/S0378874112006393?via%3Dihub "sciencedirect"Sciencedirect]</ref>
<ref name="Leaf">[https://gobotany.newenglandwild.org/species/polemonium/caeruleum/ "plant Plant charecteristics"]</ref>
<ref name="How to plant/cultivate">[https://www.pfaf.org/USER/Plant.aspx?LatinName=Polemonium+caeruleum "cultivation Cultivation details"]</ref>
</references>
