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Bransford, W.D. and Dolphia
Rhododendron albiflorum Hook.
Cascade azalea, White Rhododendron
USDA Symbol: rhal2
USDA Native Status: L48 (N), CAN (N)
A shrub with 1-4 white, bowl-shaped flowers clustered in leaf axils along the stem.
This species does not produce the spectacular brilliant flowers that many of its relatives do, yet its dainty clusters of mildly citrus-scented white flowers and bright green leaves are delightful. The genus name comes from the Greek rhodon (rose) and dendron (tree).
Plant CharacteristicsDuration: Perennial Habit: Shrub Leaf:
Bloom InformationBloom Color: White
Bloom Time: Jul , Aug
, WA Canada: BC Native Distribution:
British Columbia; south to Oregon; east to western Montana. Native Habitat:
Wet places in the mountains.
Growing ConditionsWater Use: High
Light Requirement: Sun , Part Shade , Shade
Soil Moisture: Dry , Moist , Wet
CaCO3 Tolerance: None
BenefitWarning: Rhododendrons contain poisonous substances and should not be ingested by humans or animals. Honey made from flowers also may be toxic. POISONOUS PARTS: All parts. Highly Toxic, May be Fatal if eaten. Symptoms include salivation, watering of eyes and nose, abdominal pain, loss of energy, depression, nausea and vomiting, diarrhea, weakness, difficult breathing, progressive paralysis of arms and legs, coma. Toxic Principle: Andromedotoxin. (Poisonous Plants of N.C.)
Conspicuous Flowers: yes
National Wetland Indicator Status
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.
Record Last Modified: 2007-01-01
Research By: TWC Staff