Rhododendron albiflorum Hook.
white-flowered rhododendron (Cascade azalea; white rhododendron)
Ericaceae (Crowberry family)

Introduction to Vascular Plants


© Brian Klinkenberg     (Photo ID #14413)


E-Flora BC Static Map

Distribution of Rhododendron albiflorum
Click here to view the full interactive map and legend

Species Information

Erect, slender-branched shrub, stems 0.5-1.2 (2) m tall; young twigs covered with coarse reddish hairs; bark peeling.
Alternate, deciduous, thin, in clusters along branches, especially at tips, narrowly elliptic to ob lanceolate, 4-8 cm long, pointed at ends, entire to wavy-margined, yellowish-green, upper surfaces with fine rusty hairs; stalks 5-10 mm long, glandular-hairy as well as coarsely reddish-hairy.
In axillary clusters of 1 to 4 on previous year's growth; flower stalks slender, up to 1.5 cm long, glandular-hairy; corollas white, broadly bell-shaped, 1.5-2 cm wide, up to 2 cm long, fused near base, the lobes spreading, nearly equal, entire; calyx divided to the base, the 5 lobes 8-10 mm long, leaflike, hairy with fine, gland-tipped, and some long, reddish hairs; stamens 10, filaments densely hairy on the lower half; anthers egg-shaped, unawned.
Capsules, egg-shaped, 6-8 mm long, thick-walled.

SourceThe Illustrated Flora of British Columbia


If more than one illustration is available for a species (e.g., separate illustrations were provided for two subspecies) then links to the separate images will be provided below. Note that individual subspecies or varietal illustrations are not always available.

USDA Species Characteristics

Flower Colour:
Blooming Period:
Late Summer
Fruit/Seed characteristics:
Colour: Black
Present from Summer to Fall
Source:  The USDA


Ecological Framework for Rhododendron albiflorum

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




Elevation (metres)
1571 6 2515
Slope Gradient (%)
28 0 420

Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]

352 0 360
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
3 0 8
Modal Nutrient Regime
# of field plots
 species was recorded in:
Modal BEC Zone Class

All BEC Zones (# of stations/zone) species was recorded in

AT(4), BAFA(3), BWBS(33), CWH(32), ESSF(4614), ICH(336), IDF(6), MH(113), MS(257), SBPS(5), SBS(144), SWB(2)

Habitat and Range

Dry to wet forests and openings in the montane and subalpine zones; common in C and S BC; E to SW AB, and S to OR and W MT.

SourceThe Illustrated Flora of British Columbia