Salix fuscescens

Andersson

Monogr. Salicum, 97. 1867.

Common names: Alaska bog willow
Illustrated
Synonyms: Salix fuscescens var. reducta C. R. Ball
Treatment appears in FNA Volume 7. Treatment on page 72. Mentioned on page 25, 61, 68, 73, 74, 76, 80.

Plants 0.15–0.55 m, forming clones by layering. Stems decumbent or trailing; branches yellowbrown, glabrous; branchlets redbrown, gray-brown, or yellowbrown, glabrous. Leaves: stipules absent or rudimentary; petiole 2–5.6 (–6.4) mm; largest medial blade hypostomatous, narrowly oblong, oblong, obovate, or broadly obovate, (14–) 17–27 (–45) × 7–21 mm, 1.4–2.5 times as long as wide, base cuneate or convex, margins slightly revolute or flat, entire, or serrulate to crenate proximally, (glands marginal), apex convex, acuminate, or rounded, abaxial surface glaucous, glabrous, adaxial slightly or highly glossy, glabrous; proximal blade margins entire, (sometimes hairs ferruginous abaxially); juvenile blade glabrous. Catkins: staminate 8–58 × 5–19 mm, flowering branchlet 0.5–15 mm; pistillate moderately densely to loosely flowered, slender, stout, or subglobose, 13.5–64 (–70 in fruit) × 6.5–15 mm, flowering branchlet 4–18 mm; floral bract brown or bicolor, 0.8–1.6 mm, apex rounded, entire, abaxially sparsely hairy, hairs (usually white, sometimes also ferruginous), wavy or straight. Staminate flowers: abaxial nectary absent, adaxial nectary oblong, 0.5–0.8 mm; filaments distinct or connate less than 1/2 their lengths, glabrous; anthers ellipsoid or shortly cylindrical, 0.3–0.4 mm. Pistillate flowers: abaxial nectary absent, adaxial nectary oblong, 0.4–0.9 mm, shorter than stipe; stipe 0.8–2.5 mm; ovary obclavate, pubescent or short-silky to glabrescent, hairs (often ferruginous), flattened or ribbonlike, beak abruptly tapering to styles; ovules 8–12 per ovary; styles connate or distinct distally, 0.1–0.4 (–0.65) mm; stigmas slenderly or broadly cylindrical, 0.24–0.3–0.68 mm. Capsules 5.5–8 mm. 2n = 38.


Phenology: Flowering Jun-late Jul.
Habitat: Bogs, treed bogs, sedge fens, poorly drained lakeshores, wet tundra, silt or fine sandy-gravel substrates
Elevation: 50-1000 m

Distribution

V7 70-distribution-map.gif

Man., N.W.T., Nunavut, Yukon, Alaska, e Asia (Chukotka), e Asia (Japan [Hokkaido]), e Asia (North Korea), e Asia (Russian Far East), e Asia (arctic), e Asia (e Siberia)

Discussion

Hybrids:

Salix fuscescens forms natural hybrids on the arctic coast of Alaska with S. arctica, S. ovalifolia, and S. phlebophylla, and in continental Nunavut with S. herbacea. These hybrids are not usually recognized but they appear sporadically.

Salix fuscescens × S. herbacea has crenate margins and is often confused with the latter species.

Some specimens identified as Salix fuscescens × S. ovalifolia are similar to hybrids with S. phlebophylla, but they lack marcescent leaves.

Salix fuscescens × S. phlebophylla has obovate leaves with one or two pairs of serrulations proximally, and glaucous abaxially as in S. fuscescens, but it grows in relatively dry tundra and has the marcescent, sometimes skeletonized, leaves of S. phlebophylla.

Selected References

None.

Lower Taxa

None.

"-0.68mm" is not declared as a valid unit of measurement for this property.

... more about "Salix fuscescens"
glabrous +  and glaucous +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.09 cm0.9 mm <br />9.0e-4 m <br />) +
red turning yellow +
cylindrical +  and ellipsoid +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.04 cm0.4 mm <br />4.0e-4 m <br />) +
Rounded (?) +, Acuminate (?) +  and Convex (?) +
George W. Argus +
Andersson +
convex +  and cuneate +
Salix sect. Chamaetia +
tapering +
toothed +  and 2-fid +
persistent +
yellowbrown +
subglobose +  and globose +
0.4 cm4 mm <br />0.004 m <br /> (1.8 cm18 mm <br />0.018 m <br />) +
0.55 cm5.5 mm <br />0.0055 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
flowered +, pistillate +  and staminate +
1.35 cm13.5 mm <br />0.0135 m <br /> (6.4 cm64 mm <br />0.064 m <br />) +
pendulous +, spreading +  and erect +
subglobose +
slender +
0.65 cm6.5 mm <br />0.0065 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
Alaska bog willow +
Man. +, N.W.T. +, Nunavut +, Yukon +, Alaska +, e Asia (Chukotka) +, e Asia (Japan [Hokkaido]) +, e Asia (North Korea) +, e Asia (Russian Far East) +, e Asia (arctic) +  and e Asia (e Siberia) +
50-1000 m +
connate +  and distinct +
bicolor +  and brown +
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.16 cm1.6 mm <br />0.0016 m <br />) +
pistillate +  and staminate +
bisexual +  and unisexual +
spherical +
Bogs, treed bogs, sedge fens, poorly drained lakeshores, wet tundra, silt or fine sandy-gravel substrates +
ferruginous +, gray +  and white +
straight +
ribbonlike +, flattened +  and wavy +
unbranched +  and spicate +
subterminal +  and axillary +
membranaceous +
2.7 cm27 mm <br />0.027 m <br /> (4.5 cm45 mm <br />0.045 m <br />) +
1.7 cm17 mm <br />0.017 m <br /> (2.7 cm27 mm <br />0.027 m <br />) +
obovate +  and oblong +
0.7 cm7 mm <br />0.007 m <br /> (2.1 cm21 mm <br />0.021 m <br />) +
arranged +  and alternate +
marcescent +
deciduous +
serrulate +  and crenate +
2-7[-10]-carpellate +
short-silky +  and glabrescent +
obclavate +
0.56 cm5.6 mm <br />0.0056 m <br /> (0.64 cm6.4 mm <br />0.0064 m <br />) +
glandular-dotted +
flat;convex;flat;convex +
0.2 cm2 mm <br />0.002 m <br /> (0.56 cm5.6 mm <br />0.0056 m <br />) +
Flowering Jun-late Jul. +
Monogr. Salicum, +
overlapping +
distinct +
Illustrated +
branched +, sympodial +, monopodial +  and branching +
trailing;decumbent +
non-papillate +
cylindrical +
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
caducous +  and persistent +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.065 cm0.65 mm <br />6.5e-4 m <br />) +
distinct +  and connate +
0.01 cm0.1 mm <br />1.0e-4 m <br /> (0.04 cm0.4 mm <br />4.0e-4 m <br />) +
persistent +  and deciduous +
ferruginous +  and white +
Salix fuscescens var. reducta +
Salix fuscescens +
Salix sect. Myrtosalix +
species +
rounded +
sympodial +, branching +  and heterophyllous +