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Salix athabascensis Raup
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Melampsoraceae  Melampsora abieti-capraearum @ BPI (1)

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Salix athabascensis Raup
Athabasca willow

General Information
Symbol: SAAT
Group: Dicot
Family: Salicaceae
Duration: Perennial
Growth Habit : Shrub
Native Status : AK   N
Data Source and Documentation
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Native Status:
lower 48 status L48    Alaska status AK    Hawaii status HI    Puerto Rico status PR    Virgin Islands status VI    Navassa Island NAV    Canada status CAN    Greenland status GL    Saint Pierre and Michelon status SPM    North America NA   




Symbol Scientific Name
SAFA10 Salix fallax Raup
SAPEA Salix pedicellaris Pursh var. athabascensis (Raup) B. Boivin


Click on a scientific name below to expand it in the PLANTS Classification Report.
Rank Scientific Name and Common Name
Kingdom Plantae – Plants
Subkingdom Tracheobionta – Vascular plants
Superdivision Spermatophyta – Seed plants
Division Magnoliophyta – Flowering plants
Class Magnoliopsida – Dicotyledons
Subclass Dilleniidae
Order Salicales
Family Salicaceae – Willow family
Genus Salix L. – willow
Species Salix athabascensis Raup – Athabasca willow

Subordinate Taxa

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Legal Status

Wetland Status

Interpreting Wetland Status

North America
Alaska OBL

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Source Large Mammals Small Mammals Water Birds Terrestrial Birds


Source Large Mammals Small Mammals Water Birds Terrestrial Birds

Description of Values

Value Class Food Cover

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FNA | Family List | FNA Vol. 7 | Salicaceae | Salix

45. Salix athabascensis Raup, Rhodora. 32: 111, plate 202. 1930.

Athabasca willow

Salix fallax Raup; S. pedicellaris Pursh var. athabascensis (Raup) B. Boivin

Plants 0.6-1.3 m, not clonal. Stems erect; branches gray-brown, hairy; branchlets red-brown, sparsely or moderately densely pubescent, (buds alba -type). Leaves: stipules absent or rudimentary on early ones, usually rudimentary, rarely foliaceous, on late ones; petiole (shallowly grooved adaxially), 3-10 mm, (puberulent or villous); largest medial blade oblong, narrowly elliptic, elliptic, oblanceolate, or obovate, 17-50 × 8-18 mm, 1.9-3.2 times as long as wide, base cuneate or convex, margins flat or slightly revolute, entire, apex acuminate or convex, abaxial surface glabrescent or sparsely silky, hairs appressed or somewhat spreading, (usually white, sometimes also ferruginous), straight or wavy, adaxial dull or slightly glossy, glabrous, glabrescent, pilose, or sparsely long-silky along midribs and margin, (hairs usually white, sometimes also ferruginous, appressed); proximal blade margins entire; juvenile blade sparsely to moderately densely villous or long-silky abaxially (hairs usually white, sometimes also ferruginous). Catkins: staminate 14-31 × 8-18 mm, flowering branchlet 1.5-9 mm; pistillate loosely flowered, stout to globose, 10-58 × 7-25 mm, flowering branchlet 3.5-26 mm; floral bract tawny, 1-1.6 mm, apex rounded, entire, abaxially sparsely hairy, almost glabrous, hairs wavy. Staminate flowers: abaxial nectary (0-)0.3-0.6 mm, adaxial nectary oblong or ovate, 0.4-1.2 mm, nectaries distinct; filaments distinct, hairy basally or on proximal 1/2; anthers globose, 0.4-0.6 mm. Pistillate flowers: abaxial nectary absent, adaxial nectary oblong, 0.4-1.3 mm, shorter than stipe; stipe 0.8-1.3 mm; ovary pyriform, very densely long-silky, beak gradually tapering to or slightly bulged below styles; ovules 6-14 per ovary; styles 0.5-1 mm; stigmas flat, abaxially non-papillate with rounded tip, or broadly to slenderly cylindrical, 0.28-0.35-0.48 mm. Capsules 5.6-7.2 mm. 2 n = 76, 95, 114.

Flowering late May-late Jul. Fens, bogs, and treed bogs; 0-1800 m; Alta., B.C., Man., N.W.T., Sask., Yukon; Alaska.

The three polyploid chromosome numbers reported for Salix athabascensis, as well as the presence of leaves with ferruginous hairs, otherwise unknown in sect. Myrtilloides , are indicators of allopolyploidy.


Salix athabascensis forms natural hybrids with S. pedicellaris . These hybrids combine the characteristics of the parents. The ovaries may be moderately densely villous or glabrous, but commonly have hairs in patches, or the stipes may be hairy and the ovaries glabrous; juvenile blades, and sometimes mature leaves, are hairy with white and ferruginous hairs. Some plants that resemble S. athabascensis have leaves glaucous adaxially, as in S. pedicellaris . The ovaries often appear to be infertile.

Updated: 2019-11-15 16:23:41 gmt
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