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Bransford, W.D. and Dolphia
Allium validum S. Watson
Pacific onion, Swamp onion, Tall swamp onion
USDA Symbol: ALVA
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.
Plant CharacteristicsDuration: Perennial Habit: Herb Leaf Complexity: Simple Leaf:
Green Fruit: Size Class:
Bloom InformationBloom Color: Pink
Bloom Time: Jun , Jul , Aug , Sep
, 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 ConditionsWater Use: High
Light Requirement: Sun
Soil Moisture: Moist
CaCO3 Tolerance: Medium
Soil Description: Moist soils.
Conditions Comments: Not Available
BenefitConspicuous Flowers: yes
PropagationDescription: 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
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 either on display or available from the following:
Santa Barbara Botanic Garden
- Santa Barbara, CANative Seed Network
- Corvallis, OR
Record Last Modified: 2007-01-01
Research By: TWC Staff