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Search for native plants by scientific name, common name or family. If you are not sure what you are looking for, try the Combination Search or our Recommended Species lists.

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Allium validum (Pacific onion)
Bransford, W.D. and Dolphia

Allium validum

Allium validum S. Watson

Pacific Onion, Swamp Onion, Tall Swamp Onion

Liliaceae (Lily Family)



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

From vigorous rhizomes occur large patches of flat, upright leaves, and flowering stalks to 1-3 ft. in height. Purple-pink flowers occur in tight clusters.


From the Image Gallery

2 photo(s) available in the Image Gallery

Plant Characteristics

Duration: Perennial
Habit: Herb
Leaf Complexity: Simple
Leaf: Green
Size Class: 1-3 ft.

Bloom Information

Bloom Color: Pink
Bloom Time: Jun , Jul , Aug , Sep


USA: CA , ID , NV , OR , WA
Canada: BC
Native Distribution: Mts. from Lake Co., CA to s. B.C., e. to w. ID & n.e. NV
Native Habitat: Swampy meadows at medium & high elevations

Growing Conditions

Water Use: High
Light Requirement: Sun
Soil Moisture: Moist
CaCO3 Tolerance: Medium
Soil Description: Moist soils.
Conditions Comments: Not Available


Conspicuous Flowers: yes


Description: Seed is easy to germinate using a gritty medium. Bulbs can be thinned in two or three years. Offsets may also be used to obtain new plants.
Seed Collection: Not Available
Seed Treatment: No treatment.
Commercially Avail: yes

Find Seed or Plants

Find seed sources for this species at the Native Seed Network.

National Wetland Indicator Status

Status: OBL OBL
This information is derived from the U.S. Army Corps of Engineers National Wetland Plant List, Version 3.1 (Lichvar, R.W. 2013. The National Wetland Plant List: 2013 wetland ratings. Phytoneuron 2013-49: 1-241). Click here for map of regions.

From the National Organizations Directory

According to the species list provided by Affiliate Organizations, this plant is on display at the following locations:

Santa Barbara Botanic Garden - Santa Barbara, CA
Native Seed Network - Corvallis, OR

Additional resources

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


Record Modified: 2007-01-01
Research By: TWC Staff

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