''Polemonium boreale'', the northern Jacob's-ladder or boreal Jacobs-ladder, is a plant native to the most of the high arctic. In Greenland it is found only in a small area on the east coast. It is not very common. The whole plant is pubescent, with long woolly hairs, glandular, and grows to 5–10 cm tall. The basal

leaves A leaf (plural, : leaves) is any of the principal appendages of a vascular plant plant stem, stem, usually borne laterally aboveground and specialized for photosynthesis. Leaves are collectively called foliage, as in "autumn foliage", wh ...

are more or less alternate, and pinnate, with numerous leaflets. The flowers are produced in a more or less capitate inflorescence, each flower bell-shaped, blue, 15 mm long, 2.5 times longer than the

calyx Calyx or calyce (plural "calyces"), from the Latin ''calix'' which itself comes from the Ancient Greek ''κάλυξ'' (''kálux'') meaning "husk" or "pod", may refer to: Biology * Calyx (anatomy), collective name for several cup-like structures ...

. The plant has a very unpleasant smell, and grows on gravelly slopes and in crevices. Image:Polemonium boreale - Jacobsledder2.jpg, Native to the most of the high arctic, its range includes

Svalbard Svalbard ( , ), also known as Spitsbergen, or Spitzbergen, is a Norwegian archipelago in the Arctic Ocean. North of mainland Europe, it is about midway between the northern coast of Norway and the North Pole. The islands of the group range ...

. File:Polemonium_boreale_8882.JPG, The inflorescence consists of 3—7 (exceptionally 9), 5–15 mm flowers. File:Polemonium_boreale_8879.JPG, Basal leaves are pinnate with numerous small leaflets.

References

{{Taxonbar, from=Q1796649

boreale Les brasseurs du Nord ''(The Brewers of/from the North)'' is a brewery just north of Montreal, in Blainville, Quebec, Canada. History Founded in 1987 by three students at the UQAM (Laura Urtnowski, and brothers Bernard and Jean Morin), who paid ...

Flora of the Arctic Flora of Greenland Flora of Norway