Salix stolonifera

Coville

Proc. Wash. Acad. Sci. 3: 333, plate 41, fig. 1. 1901.

Common names: Creeping willow
Endemic
Treatment appears in FNA Volume 7. Treatment on page 75. Mentioned on page 24, 27, 62, 80, 81, 114, 115.

Plants 0.02–0.1 m, forming clones by layering or rhizomes. Stems trailing or erect; branches redbrown, (sometimes weakly glaucous), glabrous; branchlets yellowbrown or greenish brown, glabrous. Leaves: stipules (sometimes marcescent) absent or rudimentary on early ones, rudimentary or foliaceous on late ones; petiole (deeply to shallowly grooved adaxially), 3–9–20 mm, (ciliate, glabrous adaxially); largest medial blade amphistomatous or hemiamphistomatous, (sometimes with 2 pairs of secondary-veins arising at or close to base, arcing toward apex), elliptic, broadly elliptic, or subcircular, 16–42 × 12–30 (–38) mm, 1–2 times as long as wide, base convex, cuneate, or rounded, margins flat or slightly revolute, entire or serrulate, ciliate (hairs wavy), apex convex, acuminate, rounded, or retuse, abaxial surface glabrous, adaxial highly glossy, glabrous; proximal blade margins entire or irregularly serrulate; juvenile blade pilose to glabrescent abaxially. Catkins: staminate 13–31 × 7–11 mm, flowering branchlet 1–15 mm; pistillate moderately densely to loosely flowered, stout to globose, 15–54 (–90 in fruit) × 6–15 mm, flowering branchlet 2–42 mm; floral bract brown, 1.6–2 mm, apex rounded, entire, abaxially sparsely hairy throughout or distally, hairs straight or wavy. Staminate flowers: abaxial nectary (0–) 0.2–0.7 mm, adaxial nectary oblong, narrowly oblong, or ovate, 0.6–1.3 mm, nectaries distinct; filaments distinct (glabrous); anthers ellipsoid, 0.5–0.6 mm. Pistillate flowers: abaxial nectary absent, adaxial nectary oblong, 0.5–1.4 mm, longer than stipe; stipe 0.2–0.8 mm; ovary pyriform, sometimes glaucous, glabrous, beak gradually tapering to styles; ovules 12–13 per ovary; styles connate to distinct 1/2 their lengths, (0.6–) 0.8–2 mm; stigmas flat, abaxially non-papillate with rounded or pointed tip, or slenderly cylindrical, 0.32–0.5–0.88 mm. Capsules 4–10 mm.


Phenology: Flowering early Jun-early Jul.
Habitat: Arctic, subarctic, and alpine, wet sedge meadows, hummocky tundra, raised center polygons, Dryas-willow-sedge tundra, Dryas mats on dry ridge tops
Elevation: 0-1000 m

Discussion

Hybrids:

Salix stolonifera forms natural hybrids with S. arctica and S. barclayi.

Selected References

None.

Lower Taxa

None.

"-20mm" is not declared as a valid unit of measurement for this property."-0.88mm" is not declared as a valid unit of measurement for this property.

... more about "Salix stolonifera"
0 cm0 mm <br />0 m <br /> (0.02 cm0.2 mm <br />2.0e-4 m <br />) +
connate +  and distinct +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.07 cm0.7 mm <br />7.0e-4 m <br />) +
oblong +  and ovate +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.14 cm1.4 mm <br />0.0014 m <br />) +
red turning yellow +
ellipsoid +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.06 cm0.6 mm <br />6.0e-4 m <br />) +
Rounded (?) +, Retuse (?) +, Acuminate (?) +  and Convex (?) +
George W. Argus +
Coville +
rounded +, cuneate +  and convex +
Ovalifoliae +
tapering +
serrulate +  and entire +
pilose +  and glabrescent +
toothed +  and 2-fid +
persistent +
subglobose +  and globose +
0.2 cm2 mm <br />0.002 m <br /> (4.2 cm42 mm <br />0.042 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (1 cm10 mm <br />0.01 m <br />) +
flowered +, pistillate +  and staminate +
1.5 cm15 mm <br />0.015 m <br /> (5.4 cm54 mm <br />0.054 m <br />) +
pendulous +, spreading +  and erect +
0.6 cm6 mm <br />0.006 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
Creeping willow +
Alta. +, B.C. +  and Alaska. +
0-1000 m +
0.16 cm1.6 mm <br />0.0016 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
pistillate +  and staminate +
bisexual +  and unisexual +
spherical +
Arctic, subarctic, and alpine, wet sedge meadows, hummocky tundra, raised center polygons, Dryas-willow-sedge tundra, Dryas mats on dry ridge tops +
ferruginous +  and white +
straight +
unbranched +  and spicate +
subterminal +  and axillary +
membranaceous +
hemiamphistomatous +  and amphistomatous +
3 cm30 mm <br />0.03 m <br /> (3.8 cm38 mm <br />0.038 m <br />) +
1.6 cm16 mm <br />0.016 m <br /> (4.2 cm42 mm <br />0.042 m <br />) +
subcircular +  and elliptic +
1.2 cm12 mm <br />0.012 m <br /> (3 cm30 mm <br />0.03 m <br />) +
arranged +  and alternate +
marcescent +
deciduous +
serrulate +  and entire +
revolute +  and flat +
2-7[-10]-carpellate +
glabrous +  and glaucous +
pyriform +
glandular-dotted +
flat;convex;flat;convex +
Flowering early Jun-early Jul. +
Proc. Wash. Acad. Sci. +
overlapping +
distinct +
branched +, sympodial +, monopodial +  and branching +
erect;trailing +
non-papillate +
cylindrical +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.08 cm0.8 mm <br />8.0e-4 m <br />) +
caducous +  and persistent +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.08 cm0.8 mm <br />8.0e-4 m <br />) +
connate +  and distinct +
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
persistent +  and deciduous +
ferruginous +  and white +
Salix stolonifera +
Salix sect. Ovalifoliae +
species +
pointed +  and rounded +
sympodial +, branching +  and heterophyllous +