Polemonium boreale
Polemonium boreale, the northern Jacob's-ladder[1] 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.
| Polemonium boreale | |
|---|---|
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| Polemonium boreale near Matanuska Glacier, Alaska | |
Scientific classification  | |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Asterids |
| Order: | Ericales |
| Family: | Polemoniaceae |
| Genus: | Polemonium |
| Species: | P. boreale |
| Binomial name | |
| Polemonium boreale | |
The whole plant is pubescent, with long woolly hairs, glandular, and grows to 5–10 cm tall. The basal leaves 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. The plant has a very unpleasant smell, and grows on gravelly slopes and in crevices.
The inflorescence consists of 3—7 (exceptionally 9), 5–15 mm flowers.
Basal leaves are pinnate with numerous small leaflets.
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References
- "Polemonium boreale". Natural Resources Conservation Service PLANTS Database. USDA. Retrieved 9 October 2015.
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