Spiraea douglasii subsp. menziesii Hook. (Hook.) Calder & Roy L. Taylor
pink spirea
Rosaceae (Rose family)

Introduction to Vascular Plants

Photograph

© Allan Carson     (Photo ID #17851)


Map

E-Flora BC Static Map

Distribution of Spiraea douglasii subsp. menziesii
Click here to view the full interactive map and legend

Species Information

General:
Low to medium shrub, 0.5-2.5 m tall, from creeping rhizome, often forming thickets; stems erect, much-branched, the slender branchlets usually somewhat woolly, later becoming smooth.
Leaves:
Alternate, deciduous, short-stalked, oblong to egg-shaped, 3-10 cm long, coarsely toothed mostly above the middle, dark green and smooth above, paler and woolly-hairy to smooth beneath.
Flowers:
Inflorescence a branched, narrowly conic to cylindric, dense terminal cluster of numerous small flowers, the cluster several times longer than broad, the branches often woolly; corollas deep to pale pink, the petals 5, egg-shaped to round-elliptic, about 2 mm long; calyces fine-hairy to nearly smooth on the outside, 5-lobed, the lobes triangular, bent back, about 1 mm long; ovaries superior; stamens numerous.
Fruits:
Follicles, usually 5, short-beaked, 2-3 mm long, somewhat leathery, smooth except sometimes a few long hairs along the suture, shining; seeds several, spindle-shaped.
Notes:
Two subspecies occur in BC:

1. Leaves greyish-woolly beneath; plants of the coast................... ssp. douglasii

1. Leaves smooth to hairy, but not greyish-woolly beneath; plants from throughout southern two-thirds of BC.................. ssp. menziesii (Hook.) Calder & Taylor

SourceThe Illustrated Flora of British Columbia

Ecology

Ecological Framework for Spiraea douglasii ssp. menziesii

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

Avg

Min

Max

Elevation (metres)
974 720 1360
Slope Gradient (%)
0 0 5

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

229 230 230
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
6 5 8
Modal Nutrient Regime
Class
C
# of field plots
 species was recorded in:
6
Modal BEC Zone Class
ICH

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

ESSF(1), ICH(2), MS(1), SBS(2)

Habitat and Range

Fens, swamps, bogs, streambanks, lake margins, and moist to wet thickets and open forests in the lowland and montane zones; common throughout BC, S of about 56oN; S to CA and ID.

SourceThe Illustrated Flora of British Columbia