Salix myricoides

Muhlenberg

Ges. Naturf. Freunde Berlin Neue Schriften 4: 235, plate 6, fig. 2. 1803.

Common names: Blue-leaf willow
IllustratedEndemic
Synonyms: Salix glaucophylla var. albovestita C. R. Ball Salix glaucophylloides Fernald Salix glaucophylloides var. albovestita (C. R. Ball) Fernald Salix glaucophylloides var. glaucophylla C. K. Schneider Salix myricoides var. albovestita (C. R. Ball) Dorn
Treatment appears in FNA Volume 7. Treatment on page 119. Mentioned on page 90, 92, 93, 95, 96, 98, 101, 120, 121, 127, 135.

Plants 0.3–5 m, (sometimes forming clones by stem fragmentation or layering). Stems: branches (sometimes highly brittle at base), redbrown or yellowbrown, not or weakly glaucous, (slightly or highly glossy), glabrous or villous; branchlets redbrown or yellowbrown, glabrous or sparsely to very densely villous, (buds caprea-type, inner membranaceous bud-scale layer free and separating or not). Leaves: stipules rudimentary or foliaceous on early ones, foliaceous on late ones, apex acute or acuminate; petiole shallowly grooved, or convex to flat adaxially, 3.5–7.3–13 mm, (sometimes with 2 spherical glands distally), villous, tomentose, pilose, or pubescent adaxially; largest medial blade narrowly oblong, narrowly elliptic, elliptic, or oblanceolate, 35–61.3–110 × 11–16–46 mm, 2–2.7–5.2 times as long as wide, base convex, rounded, subcordate, or cuneate, margins flat or slightly revolute, (thickened and raised), crenulate or serrulate, apex acuminate, acute, or convex, abaxial surface usually very thickly glaucous, glabrous or pilose, midribs pubescent to tomentose, hairs (white, often also ferruginous), curved, wavy, or straight, adaxial slightly glossy, glabrous or pilose, midribs sparsely pubescent (hairs white, sometimes also ferruginous); proximal blade margins entire or serrulate; juvenile blade translucent, reddish or yellowish green, glabrous or sparsely pubescent abaxially, midribs often densely hairy, hairs white, sometimes also ferruginous. Catkins: staminate flowering before leaves emerge, pistillate as leaves emerge; staminate stout or slender, 23.5–35.6–51 × 9–12.7–22 mm, flowering branchlet 1–3.9–10 mm; pistillate loosely flowered, stout or slender, 19–42–62 (–85 in fruit) × 8–13–18 mm, flowering branchlet 1.5–5.9–13 mm; floral bract brown or bicolor, 1.2–1.8–3 mm, apex rounded or acute, sometimes toothed, abaxially hairy, hairs straight or wavy. Staminate flowers: adaxial nectary narrowly oblong, oblong, square, or ovate, 0.44–0.48–1.4 mm; filaments distinct, glabrous; anthers yellow, (ellipsoid or globose), 0.52–0.69–0.76 mm. Pistillate flowers: adaxial nectary oblong, narrowly oblong, square, or flask-shaped, 0.56–0.8–1.4 mm, shorter than stipe; stipe 0.96–1.7–3.4 mm; ovary pyriform, glabrous, beak slightly bulged below styles; ovules 12–14 per ovary; styles (sometimes distinct), 0.3–0.8–1.3 mm; stigmas flat, abaxially non-papillate with rounded or pointed tip, or slenderly cylindrical, 0.24–0.43–0.56 mm. Capsules 5–7–11 mm.


Phenology: Flowering early Apr-early Jul.
Habitat: Stream and lake shores, gravel bars, subalpine conifer forests, alkaline fens, sea cliffs, dry limestone talus, swamps, tidal meadows, sand dunes
Elevation: 0-1100 m

Distribution

V7 122-distribution-map.gif

N.B., Nfld. and Labr. (Nfld.), Ont., Que., Ill., Ind., Maine, Mich., Ohio, Pa., Wis.

Discussion

Plants with densely villous branchlets and branches have been named var. albovestita. Branchlet indumentum varies widely in the species and seems to be continuous, with both villous and glabrous variants sometimes occurring in the same area. This characteristic is more common in populations on the shores of the Great Lakes and on the western coast of James Bay, but even these populations are variable.

Reports of Salix myricoides from Akimiski Island, Nunavut, were based on misidentified S. planifolia. See 68. S. eriocephala for differences.

Hybrids:

Salix myricoides forms natural hybrids with S. bebbiana, S. discolor, and S. glauca var. cordifolia. Hybrids with S. eriocephala have been reported (M. L. Fernald 1950) but no convincing specimens have been seen. Inasmuch as S. eriocephala and S. myricoides are very similar, hybrids between the two would be very difficult to identify.

Selected References

None.

Lower Taxa

None.

"-1.4mm" is not declared as a valid unit of measurement for this property."-0.76mm" is not declared as a valid unit of measurement for this property."-13mm" is not declared as a valid unit of measurement for this property."-11mm" is not declared as a valid unit of measurement for this property."-62mm" is not declared as a valid unit of measurement for this property."-18mm" is not declared as a valid unit of measurement for this property."-3mm" is not declared as a valid unit of measurement for this property."-1.3mm" is not declared as a valid unit of measurement for this property."-110mm" is not declared as a valid unit of measurement for this property."-46mm" is not declared as a valid unit of measurement for this property."-13mm" is not declared as a valid unit of measurement for this property."-0.56mm" is not declared as a valid unit of measurement for this property."-3.4mm" is not declared as a valid unit of measurement for this property.

... more about "Salix myricoides"
21 +, 4 +, 1 +, 16 +  and 29 +
114 +, 95 +, 76 +, 57 +  and 38 +
pilose +, glabrous +  and glaucous +
flask--shaped +, square +, oblong +  and ovate +
Toothed (?) +, Acute (?) +, Rounded (?) +, Convex (?) +  and Acuminate (?) +
intermediate +
George W. Argus +
Muhlenberg +
cuneate +, subcordate +, rounded +  and convex +
Salix tribe Hastatae +
tapering +
yellowish green +, reddish +  and translucent +
ferruginous +  and white +
serrulate +  and entire +
pubescent +  and glabrous +
toothed +  and 2-fid +
persistent +
flowered +  and sessile +
subglobose to globose +  and stout +
villous +  and glabrous +
slender +  and stout +
intermediate +
flowered +, pistillate +  and staminate +
pendulous +, spreading +  and erect +
slender +, stout +  and staminate +
Blue-leaf willow +
N.B. +, Nfld. and Labr. (Nfld.) +, Ont. +, Que. +, Ill. +, Ind. +, Maine +, Mich. +, Ohio +, Pa. +  and Wis. +
0-1100 m +
bicolor +  and brown +
pistillate +  and staminate +
bisexual +  and unisexual +
Stream and lake shores, gravel bars, subalpine conifer forests, alkaline fens, sea cliffs, dry limestone talus, swamps, tidal meadows, sand dunes +
ferruginous +  and white +
straight +  and curved +
unbranched +  and spicate +
subterminal +  and axillary +
membranaceous +
hemiamphistomatous +, amphistomatous +  and hypostomatous +
oblanceolate +, elliptic +  and oblong +
arranged +  and alternate +
marcescent +
deciduous +
serrulate +, crenulate +, punct +, revolute +  and flat +
hairy +, pubescent +  and tomentose +
2-7[-10]-carpellate +
pyriform +
glandular-dotted +
pubescent +, pilose +, tomentose +  and villous +
convex;flat +
Flowering early Apr-early Jul. +
Ges. Naturf. Freunde Berlin Neue Schriften +
overlapping +
distinct +
Illustrated +  and Endemic +
yellowbrown +  and redbrown +
decumbent;erect +
non-papillate +
cylindrical +
caducous +  and persistent +
distinct +  and connate +
persistent +  and deciduous +
Salix glaucophylla var. albovestita +, Salix glaucophylloides +, Salix glaucophylloides var. albovestita +, Salix glaucophylloides var. glaucophylla +  and Salix myricoides var. albovestita +
Salix myricoides +
Salix sect. Hastatae +
species +
pointed +  and rounded +
sympodial +, branching +  and heterophyllous +