Andersson, Öfvers. Kongl. Vetensk.-Akad. Förh. 15: 132. 1858.
Low blueberry willow
0.1-0.6(-1) m, (forming clones by layering).
(decumbent); branches gray-brown, red-brown, or yellow-brown, not to strongly glaucous (dull or slightly glossy), pubescent; branchlets gray-brown, red-brown, or yellow-brown, sparsely pubescent.
stipules rudimentary, foliaceous, or absent on early ones, foliaceous on late ones (0.2-1.8(-5) mm); petiole deeply to shallowly grooved adaxially, 1.5-8 mm, glabrous or pubescent adaxially; largest medial blade (sometimes amphistomatous), elliptic, narrowly elliptic, obovate, or broadly obovate, 17-74 × 8-30 mm, 1.2-4.5 times as long as wide, base cuneate, convex, or subcordate, margins flat, serrulate, crenulate, or sinuate, apex acute, convex, or acuminate, abaxial surface not glaucous, glabrous, adaxial slightly glossy, glabrous; proximal blade margins crenate; juvenile blade reddish or yellowish green, glabrous.
flowering as leaves emerge; staminate stout, 11.5-39 × 5-14 mm, flowering branchlet 0.5-6 mm; pistillate moderately densely flowered or densely flowered, slender or stout, 16-46(-50 in fruit) × 4-15 mm, flowering branchlet 1.5-12 mm; floral bract brown, black, tawny, or bicolor, 0.4-1.1 mm, apex retuse or acute, abaxially hairy throughout or proximally, hairs curly or wavy.
adaxial nectary oblong, ovate, or square, 0.2-0.34-0.4 mm; filaments distinct, glabrous; anthers purple turning yellow, 0.3-0.6 mm.
adaxial nectary square, oblong, or ovate, 0.2-0.4 mm, shorter than stipe; stipe 0.6-1.7 mm; ovary pyriform, glabrous, beak gradually tapering to or slightly bulged below styles; ovules (6-)10-14 per ovary; styles connate or distinct 1/2 their lengths, 0.3-0.7 mm; stigmas flat, abaxially non-papillate with rounded tip, or 2 plump lobes, 0.16-0.23-0.32 mm.
Flowering early May-late Jul. Treed bogs, fens, stream banks, subalpine spruce thickets,
woods, sand dunes, coal spoils; 90-2800 m; Alta., B.C., Man., N.B., N.W.T., Nunavut, Ont., Sask., Yukon; Alaska, Colo., Wyo.
occurs in Nunavut on Akimiski Island in James Bay.
The complex of species related to
S. arizonica, S. ballii, S. boothii
. Two are diploid (
), and two are tetraploid (
); the chromosome number of
is unknown. They have been treated taxonomically in different ways, but are relatively distinct in their morphology, ecology, and geography.
has outlying populations represented by single collections each from Colorado, Quebec, and Wyoming. Specimens attributed to this species from the Gaspe Peninsula, Quebec, and the Northern Peninsula, Newfoundland, all have evidence of leaf glaucescence and are
. See 57.
for more description.
forms natural hybrids with