Salix nummularia

Andersson in A. P. de Candolle and A. L. P. P. de Candolle

in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. 16(2): 298. 1868.

Common names: Coin-leaf willow
Synonyms: Salix nummularia subsp. tundricola (Schljakov) Á. Löve & D. Löve
Treatment appears in FNA Volume 7. Treatment on page 68. Mentioned on page 27, 62, 69.

Plants 0.01–0.03 m, (dwarf), forming clones by layering. Stems trailing; branches yellowbrown or redbrown, glabrous; branchlets yellowbrown or redbrown, pubescent, pilose, or glabrescent. Leaves: stipules absent or rudimentary; petiole 1.5–2 mm (glabrous or pubescent adaxially); largest medial blade (2 pairs of secondary-veins arising at or close to base, arcing toward apex) broadly elliptic, subcircular, broadly ovate, or elliptic, 9–22 (–30) × 7.5–14 (–19) mm, 1.2–2 times as long as wide, base rounded, subcordate, cordate, or convex, margins flat or slightly revolute, entire or serrulate, apex convex, rounded, or retuse, abaxial surface glabrous, adaxial highly glossy, glabrous; proximal blade margins entire or serrulate; juvenile blade pilose or puberulent abaxially. Catkins: from lateral buds; staminate (3–8 flowers), 3.2–6.6 × 2–5.2 mm, flowering branchlet 0.8–4.6 mm; pistillate loosely flowered (3–5 flowers), shape indeterminate, 7.5–13 × 3–10 mm, flowering branchlet 0.5–10 mm; floral bract tawny, 0.6–1.4 mm, apex rounded or truncate, entire, abaxially glabrous or sparsely hairy. Staminate flowers: abaxial nectary (0.3–) 0.5–0.7 mm, adaxial nectary narrowly oblong or oblong, 0.7–1.1 mm, nectaries distinct, or connate and cupshaped; filaments distinct or connate less than 1/2 their lengths, glabrous; anthers ellipsoid, 0.4–0.5 mm. Pistillate flowers: abaxial nectary (0–) 0.6–0.9 mm, adaxial nectary narrowly oblong or oblong, 0.6–1.4 mm, longer than stipe, nectaries connate and shallowly cupshaped; stipe 0–0.7 mm; ovary pyriform, glabrous, beak slightly bulged below styles; ovules 8–10 per ovary; styles 0.2–1 mm; stigmas flat, abaxially non-papillate with rounded tip, or broadly cylindrical, 0.2–0.27–0.32 mm. Capsules 3.5–7.5 mm. 2n = 38.


Phenology: Flowering late Jun-early Aug (based on Russian collections).
Habitat: Exposed, relatively dry, stony, moss-lichen, and moss tundra, polygonal tundra, outcrops, marine sediments, sand dunes, restricted to snow-free areas, usually on acidic substrates
Elevation: 0-1900 m

Distribution

V7 63-distribution-map.gif

Alaska, Asia (China [Jilin]), Asia (Chukotka), Asia (Japan [Hokkaido]), Asia (North Korea), Asia (Russian Far East), Asia (arctic), Asia (e Siberia)

Discussion

Salix nummularia occurs in Alaska on St. Paul Island.

Selected References

None.

Lower Taxa

None.

"-0.32mm" is not declared as a valid unit of measurement for this property.

... more about "Salix nummularia"
0 cm0 mm <br />0 m <br /> (0.06 cm0.6 mm <br />6.0e-4 m <br />) +
connate +  and distinct +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.09 cm0.9 mm <br />9.0e-4 m <br />) +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.14 cm1.4 mm <br />0.0014 m <br />) +
red turning yellow +
ellipsoid +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
entire +  and truncate +
hairy +  and glabrous +
Rounded (?) +, Retuse (?) +  and Convex (?) +
George W. Argus +
Andersson in A. P. de Candolle and A. L. P. P. de Candolle +
convex +, cordate +, subcordate +  and rounded +
Salix sect. Chamaetia +
tapering +
serrulate +  and entire +
puberulent +  and pilose +
toothed +  and 2-fid +
persistent +
redbrown +  and yellowbrown +
glabrescent +, pilose +  and pubescent +
subglobose +  and globose +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (1 cm10 mm <br />0.01 m <br />) +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.75 cm7.5 mm <br />0.0075 m <br />) +
flowered +, pistillate +  and staminate +
0.75 cm7.5 mm <br />0.0075 m <br /> (1.3 cm13 mm <br />0.013 m <br />) +
pendulous +, spreading +  and erect +
indeterminate +
0.3 cm3 mm <br />0.003 m <br /> (1 cm10 mm <br />0.01 m <br />) +
Coin-leaf willow +
Alaska +, Asia (China [Jilin]) +, Asia (Chukotka) +, Asia (Japan [Hokkaido]) +, Asia (North Korea) +, Asia (Russian Far East) +, Asia (arctic) +  and Asia (e Siberia) +
0-1900 m +
connate +  and distinct +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.14 cm1.4 mm <br />0.0014 m <br />) +
pistillate +  and staminate +
bisexual +  and unisexual +
spherical +
Exposed, relatively dry, stony, moss-lichen, and moss tundra, polygonal tundra, outcrops, marine sediments, sand dunes, restricted to snow-free areas, usually on acidic substrates +
ferruginous +  and white +
cylindrical +, ribbonlike +  and flattened +
unbranched +  and spicate +
subterminal +  and axillary +
membranaceous +
2.2 cm22 mm <br />0.022 m <br /> (3 cm30 mm <br />0.03 m <br />) +
1.4 cm14 mm <br />0.014 m <br /> (1.9 cm19 mm <br />0.019 m <br />) +
0.9 cm9 mm <br />0.009 m <br /> (2.2 cm22 mm <br />0.022 m <br />) +
elliptic +, ovate +  and subcircular +
0.75 cm7.5 mm <br />0.0075 m <br /> (1.4 cm14 mm <br />0.014 m <br />) +
arranged +  and alternate +
marcescent +
deciduous +
serrulate +  and entire +
revolute +  and flat +
connate +  and distinct +
2-7[-10]-carpellate +
pyriform +
glandular-dotted +
flat;convex;flat;convex +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
Flowering late Jun-early Aug (based on Russian collections). +
in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. +
overlapping +
distinct +
branched +, sympodial +, monopodial +  and branching +
non-papillate +
cylindrical +
0 cm0 mm <br />0 m <br /> (0.07 cm0.7 mm <br />7.0e-4 m <br />) +
caducous +  and persistent +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
persistent +  and deciduous +
ferruginous +  and white +
Salix nummularia subsp. tundricola +
Salix nummularia +
Salix sect. Herbella +
species +
rounded +
sympodial +, branching +  and heterophyllous +