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Bransford, W.D. and Dolphia

Polemonium occidentale

Polemonium occidentale Greene

Western Polemonium, Western Jacob's Ladder

Polemoniaceae (Phlox Family)

Synonym(s):

USDA Symbol: POOC2

USDA Native Status: L48 (N), CAN (N)

Western Jacob�s-ladder is a 1 1/2-3 ft. perennial with basal clusters of dark-green, pinnately compound leaves. Its blue, bell-shaped flowers are crowded in an elongate, openly branched cluster.

The leaves resemble long ladders; the genus is known by the common name Jacob's Ladder. Leafy Polemonium (P. foliosissimum), which grows from Idaho and Wyoming south to Arizona and New Mexico, is somewhat leafier than Western Polemonium, the upper leaves not much smaller than those at the base.

From the Image Gallery

3 photo(s) available in the Image Gallery

Plant Characteristics

Duration: Perennial
Habit: Herb
Fruit Type: Capsule
Size Notes: Up to about 3 feet tall.
Leaf: Dark Green

Bloom Information

Bloom Color: Blue
Bloom Time: Jun , Jul , Aug

Distribution

USA: CA , CO , ID , MN , MT , NV , OR , UT , WA , WI , WY
Native Distribution: B.C. & Alt., s. to CA & CO; mostly e. of the Cascades
Native Habitat: Wet, open conifer forests or meadow edges; 3000-11,000 ft.

Growing Conditions

Water Use: High
Light Requirement: Part Shade
Soil Moisture: Wet
CaCO3 Tolerance: Low
Soil Description: Wet to moist, well-drained soils.

Benefit

Conspicuous Flowers: yes

Propagation

Description: Propagate by division or seed.
Seed Treatment: Stratify.
Commercially Avail: yes

National Wetland Indicator Status

Region:	AGCP	AK	AW	CB	EMP	GP	HI	MW	NCNE	WMVE
Status:			FACW			FACW		FACW	FACW	FACW

This information is derived from: U.S. Army Corps of Engineers. (2023). 2022 National Wetland Plant List, version 3.6. U.S. Army Engineer Research and Development Center, Vicksburg, MS. https://wetland-plants.usace.army.mil/. Click here for map of regions.

Web Reference

Webref 37 - Calscape (2019) California Native Plant Society
Webref 23 - Southwest Environmental Information Network (2009) SEINet - Arizona Chapter

Additional resources

USDA: Find Polemonium occidentale in USDA Plants
FNA: Find Polemonium occidentale in the Flora of North America (if available)
Google: Search Google for Polemonium occidentale

Metadata

Record Modified: 2023-02-23
Research By: TWC Staff

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