Salix reticulata

Linnaeus

Sp. Pl. 2: 1018. 1753.

Common names: Net-leaf willow
Illustrated
Synonyms: Salix reticulata var. gigantifolia C. R. Ball Salix reticulata subsp. glabellicarpa Argus Salix reticulata var. semicalva Fernald
Treatment appears in FNA Volume 7. Treatment on page 65. Mentioned on page 24, 62, 66.

Plants 0.03–0.15 m, (dwarf, forming clones by layering). Stems trailing; branches and branchlets yellowbrown or redbrown, glabrous. Leaves: stipules absent or rudimentary; petiole 3–46 mm, (sometimes glandular distally); largest medial blade amphistomatous or hemiamphistomatous, (2 pairs of secondary-veins arising at or close to base, arcing toward apex), oblong, broadly oblong, broadly elliptic, subcircular, or circular, (8–) 12–66 × 8–50 mm, 1–1.5 times as long as wide, base convex, rounded, subcordate, or cordate, margins slightly revolute, entire or crenulate (glandular-dotted), apex rounded, convex, or retuse, abaxial surface sparsely long-silky to glabrescent, adaxial (venation deeply impressed), slightly or highly glossy, glabrous or pilose; proximal blade margins entire; juvenile blade glabrous. Catkins: staminate 11–54 × 4–9 mm, flowering branchlet 2–28 mm; pistillate densely flowered (more than 6 flowers), slender or stout, 11–79 × 3–8 mm, flowering branchlet 2–37 mm; floral bract tawny, 0.8–1.8 mm, apex rounded to retuse, entire, abaxially glabrous. Staminate flowers: abaxial nectary 0.5–0.9 mm, adaxial nectary oblong or ovate, 0.5–1 mm, nectaries connate and cupshaped; filaments distinct, hairy on proximal 1/2 or throughout; anthers ellipsoid or globose, 0.3–0.4 mm. Pistillate flowers: abaxial nectary (0–) 0.3–0.5 mm, adaxial nectary narrowly oblong, 0.5–1 mm, equal to or longer than stipe, nectaries distinct or connate and cupshaped; stipe 0–0.8 mm; ovary pyriform or ovoid, short-silky, hairs flattened, beak abruptly tapering to styles; ovules 8–18 per ovary; styles connate to distinct 1/2 their lengths, 0.2–0.3 mm; stigmas flat, abaxially non-papillate with rounded tip, broadly cylindrical, or 2 plump lobes, 0.2–0.26–0.36 mm. Capsules 4.5–5 mm. 2n = 38.


Phenology: Flowering early Jun-mid Aug.
Habitat: Arctic-alpine, polygonal tundra, dry tussock tundra, partially stabilized sand dunes, sedge meadows, Dryas tundra on alpine cliffs and ledges, snowbeds, stabilized talus slopes, white spruce woods, treed bogs
Elevation: 0-3500 m

Distribution

V7 57-distribution-map.gif

Alta., B.C., Man., Nfld. and Labr., N.W.T., Nunavut, Ont., Que., Sask., Yukon, Alaska, Colo., Europe, Asia (Chukotka), Asia (Russian Far East), Asia (arctic), Asia (e Siberia), Asia (Spitzbergen)

Discussion

The reported occurrence of Salix reticulata in Colorado (R. D. Dorn 1997) needs further study.

Salix reticulata occurs in Europe in northern Scotland, northern Scandinavia, the Alps and other European mountains, and arctic Eurasia. The species is circumpolar except for Greenland and Iceland.

A population of Salix reticulata on the Queen Charlotte Islands, with consistently glabrous ovaries, was named subsp. glabellicarpa. Some southeastern Alaska populations have plants with glabrous, partially hairy, and completely short-silky ovaries growing together. The possibility that subsp. glabellicarpa may be a hybrid or a simple mutation needs study.

Selected References

None.

Lower Taxa

None.

"-0.36mm" is not declared as a valid unit of measurement for this property.

... more about "Salix reticulata"
0 cm0 mm <br />0 m <br /> (0.03 cm0.3 mm <br />3.0e-4 m <br />) +
connate +  and distinct +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
sparsely long-silky +  and glabrescent +
oblong +  and ovate +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
red turning yellow +
globose +  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 (?) +  and Retuse (?) +
George W. Argus +
Linnaeus +
cordate +, subcordate +, rounded +  and convex +
Salix sect. Chamaetia +
tapering +
toothed +  and 2-fid +
persistent +
redbrown +  and yellowbrown +
subglobose +  and globose +
0.2 cm2 mm <br />0.002 m <br /> (3.7 cm37 mm <br />0.037 m <br />) +
0.45 cm4.5 mm <br />0.0045 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
flowered +, pistillate +  and staminate +
1.1 cm11 mm <br />0.011 m <br /> (7.9 cm79 mm <br />0.079 m <br />) +
pendulous +, spreading +  and erect +
stout +  and slender +
0.3 cm3 mm <br />0.003 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
Net-leaf willow +
Alta. +, B.C. +, Man. +, Nfld. and Labr. +, N.W.T. +, Nunavut +, Ont. +, Que. +, Sask. +, Yukon +, Alaska +, Colo. +, Europe +, Asia (Chukotka) +, Asia (Russian Far East) +, Asia (arctic) +, Asia (e Siberia) +  and Asia (Spitzbergen) +
0-3500 m +
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.18 cm1.8 mm <br />0.0018 m <br />) +
pistillate +  and staminate +
bisexual +  and unisexual +
spherical +
Arctic-alpine, polygonal tundra, dry tussock tundra, partially stabilized sand dunes, sedge meadows, Dryas tundra on alpine cliffs and ledges, snowbeds, stabilized talus slopes, white spruce woods, treed bogs +
white and ferruginous +  and white +
short-silky +
flattened +
unbranched +  and spicate +
subterminal +  and axillary +
membranaceous +
hemiamphistomatous +  and amphistomatous +
0.8 cm8 mm <br />0.008 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
1.2 cm12 mm <br />0.012 m <br /> (6.6 cm66 mm <br />0.066 m <br />) +
circular +, subcircular +, elliptic +  and oblong +
0.8 cm8 mm <br />0.008 m <br /> (5 cm50 mm <br />0.05 m <br />) +
arranged +  and alternate +
marcescent +
deciduous +
crenulate +, entire +  and revolute +
connate +  and distinct +
2-7[-10]-carpellate +
short-silky +
ovoid +  and pyriform +
glandular-dotted +
flat;convex;flat;convex +
0.3 cm3 mm <br />0.003 m <br /> (4.6 cm46 mm <br />0.046 m <br />) +
Flowering early Jun-mid Aug. +
overlapping +
distinct +
Illustrated +
branched +, sympodial +, monopodial +  and branching +
non-papillate +
cylindrical +
0 cm0 mm <br />0 m <br /> (0.08 cm0.8 mm <br />8.0e-4 m <br />) +
caducous +  and persistent +
connate +  and distinct +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.03 cm0.3 mm <br />3.0e-4 m <br />) +
persistent +  and deciduous +
ferruginous +  and white +
Salix reticulata var. gigantifolia +, Salix reticulata subsp. glabellicarpa +  and Salix reticulata var. semicalva +
Salix reticulata +
Salix sect. Chamaetia +
species +
rounded +
sympodial +, branching +  and heterophyllous +