E-Flora BC: Electronic Atlas of the Flora of British Columbia

Salix pyrifolia Andersson
balsam willow
Salicaceae (Willow family)

Introduction to Vascular Plants

© Jamie Fenneman  Email the photographer   (Photo ID #29959)

E-Flora BC Static Map
Distribution of Salix pyrifolia
Click here to view our interactive map and legend
Details about map content are available here
Click on the map dots to view record details.

Species Information

Click on the image below to view an expanded illustration for this species.



General:
Dioecious shrubs, 0.4-4 m tall, not colonial; branches erect, flexible at base; twigs yellowish to red-brown, smooth or sparsely hairy; buds and foliage with a balsam-like fragrance
Leaves:
Alternate, simple narrowly oblong to elliptic or broadly elliptic, 3-10 cm long, 2-4 cm wide, lower surface glaucous, smooth, upper surface shiny or highly glossy, smooth, margins toothed or entire, bases heart-shaped to rounded, tips pointed; leaf stalks with or without glandular dots at top; stipules leaflike but soon lost.
Flowers:
Unisexual, lacking sepals and petals, borne in catkins which flower as leaves emerge or just before them, the catkins stout, on leafy twigs; floral bracts pale, hairs straight or wavy; stamens 2; ovaries 1, smooth; styles 0.4-0.5 mm long.
Fruits:
Capsules which split open to release the seeds, each of which is surrounded by a tuft of hairs; stalks 1.8-3.5 mm long.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Wet to moist muskeg, fens, stream margins and clearings in the montane zone; infrequent in E BC north of 53degreeN; N to YT and S NT, E to NF and S to ME, NH, MI, WI and MN.

Source: The Illustrated Flora of British Columbia

Ecology

Ecological Framework for Salix pyrifolia

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

Minimum

Average

Maximum

Elevation (metres) 420 908 1745
Slope Gradient (%) 0 6 60
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
2 248 350
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
1 5 8
Modal Nutrient Regime
Class
C
Number of field plots
 species was recorded in:
91
Modal BEC Zone Class
SBS
All BEC Zones (# of stations/zone) species was recorded in: BAFA(6), BWBS(23), ESSF(1), ICH(3), IDF(1), SBPS(2), SBS(52), SWB(1)

Climate

The climate type for this species, as reported in the: "British Columbia plant species codes and selected attributes. Version 6 Database" (Meidinger et al. 2008), is montane boreal & cool temperate.

Synonyms and Alternate Names

Salix balsamifera (Hook.) Barratt ex Andersson
Salix balsamifera var. alpestris Bebb
Salix balsamifera var. lanceolata Bebb
Salix balsamifera var. vegeta Bebb
Salix cordata var. balsamifera Hook.
Salix pyrifolia var. lanceolata (Bebb) Fernald

Taxonomic and Nomenclatural Links

Additional Photo Sources

General References