E-Flora BC: Electronic Atlas of the Flora of British Columbia

Polemonium boreale M.F. Adams
northern Jacob's-ladder
Polemoniaceae (Phlox family)

Introduction to Vascular Plants

© Hans Roemer  Email the photographer   (Photo ID #26177)

E-Flora BC Static Map
Distribution of Polemonium boreale
Click here to view the full interactive map and legend
Details about map content are available here
Click on the map dots to view record details.

Species Information

Click on the image below to view an expanded illustration for this species.



General:
Perennial herb from a rhizome and branching stem-base; stems single or several, loosely tufted, erect or ascending, spreading-hairy to glandular-hairy, 8-30 cm tall.
Leaves:
Alternate, mostly basal, pinnately compound; leaflets 13 to 23, elliptic to oval, 4-12 mm long, 1-5 mm wide, distinctly hairy (at least when young).
Flowers:
Inflorescences terminal or axillary head-like clusters of short-stalked flowers; corollas blue, rarely white, broadly bell-shaped, 15-20 mm long, the 5 lobes slightly longer than the yellowish tube and rounded at the tip; calyces 5-10 mm long, the 5 teeth lanceolate to oblong, usually pointed.
Fruits:
Capsules, 3-chambered.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Mesic to dry meadows, tundra, scree slopes and rock outcrops in the montane to alpine zones; rare in and E of the Coast-Cascade Mountains in BC, north of 52degreeN; circumpolar, N to AK, YT and NT; E Greenland, Scandinavia, N Asia.

Source: The Illustrated Flora of British Columbia

Ecology

Ecological Framework for Polemonium boreale

The table below shows the species-specific information calculated from
original data (BEC database) provided by the BC Ministry of Forests and Range.
(Updated August, 2013)

Site Information
Value / Class

Minimum

Average

Maximum

Elevation (metres) 780 1528 2341
Slope Gradient (%) 0 17 65
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
10 314 348
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
1 3 6
Modal Nutrient Regime
Class
C
Number of field plots
 species was recorded in:
12
Modal BEC Zone Class
ESSF
All BEC Zones (# of stations/zone) species was recorded in: BAFA(3), BWBS(2), ESSF(3), IDF(2), SWB(2)

Climate

The climate type for this species, as reported in the: "British Columbia plant species codes and selected attributes. Version 6 Database" (Meidinger et al. 2008), is not evaluated, unknown or variable.

Taxonomic and Nomenclatural Links

Additional Photo Sources

General References