Salix sphenophylla

A. K. Skvortsov

Spisok Rast. Gerb. Fl. S.S.S.R. Bot. Inst. Vsesoyuzn. Akad. Nauk 16: 62. 1966.

Common names: Wedge-leaf willow
Synonyms: Salix sphenophylla subsp. pseudotorulosa A. K. Skvortsov
Treatment appears in FNA Volume 7. Treatment on page 82. Mentioned on page 63.

Plants 0.03–0.12 m, not clonal or forming clones by layering. Stems trailing and rooting; branches yellowbrown or brownish, glabrous; branchlets yellowbrown, glabrous. Leaves: stipules absent or rudimentary; petiole 4–25 mm, (glabrous or pilose adaxially); largest medial blade hypostomatous, narrowly elliptic, broadly elliptic, obovate, or very broadly obovate, 19–52 × 10–28 mm, 1–3 times as long as wide, base cuneate or convex, margins flat or slightly revolute, entire, apex convex, retuse, or rounded, abaxial surface glabrous, pilose or sparsely long-silky to glabrescent, hairs straight or wavy, adaxial slightly glossy, glabrous or pilose; proximal blade margins entire; juvenile blade (reddish), very sparsely long-silky abaxially. Catkins: staminate 21–53 × 7–13 mm, flowering branchlet 8–20 mm; pistillate loosely to densely flowered, slender or stout, 32–79 × 7–18 mm, flowering branchlet 4–27 mm; floral bract brown or black, 1.1–2 mm, apex rounded, entire, abaxially hairy or ciliate, hairs straight. Staminate flowers: abaxial nectary absent, adaxial nectary oblong, 0.6–1 mm; filaments distinct; anthers ellipsoid or shortly cylindrical, 0.4–0.6 mm. Pistillate flowers: adaxial nectary oblong or ovate, 0.7–1.6 mm, equal to or longer than stipe; stipe 0.5–1.4 mm; ovary obclavate or pyriform, glabrous, or patchy or streaky pilose or villous, especially on beak, beak gradually tapering to or slightly bulged below styles; ovules 10–18 per ovary; styles 0.6–1.8 mm; stigmas flat, abaxially non-papillate with pointed tip, or slenderly cylindrical, 0.32–0.5–0.68 mm. Capsules 4–12 mm. 2n = 38, 57.


Phenology: Flowering mid Jun-late Jul (early Aug).
Habitat: Stony or gravelly substrates on talus, rocky outcrops, dry, stony tundra, sandy and moss tundra
Elevation: 10-900 m

Distribution

V7 85-distribution-map.gif

N.W.T., Yukon, Alaska, e Asia (Chukotka), e Asia (Russian Far East), e Asia (e Siberia)

Discussion

The patchy or streaky indumentum on the ovaries of some plants suggests that they may be hybrids.

Selected References

None.

Lower Taxa

None.

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

... more about "Salix sphenophylla"
sparsely long-silky +  and glabrescent +
ovate +  and oblong +
0.07 cm0.7 mm <br />7.0e-4 m <br /> (0.16 cm1.6 mm <br />0.0016 m <br />) +
red turning yellow +
cylindrical +  and ellipsoid +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.06 cm0.6 mm <br />6.0e-4 m <br />) +
ciliate +  and hairy +
Rounded (?) +, Retuse (?) +  and Convex (?) +
George W. Argus +
A. K. Skvortsov +
convex +  and cuneate +
Salix sect. Chamaetia +
tapering +
toothed +  and 2-fid +
persistent +
brownish +  and yellowbrown +
subglobose +  and globose +
0.4 cm4 mm <br />0.004 m <br /> (2.7 cm27 mm <br />0.027 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
pistillate +  and loosely densely flowered +
3.2 cm32 mm <br />0.032 m <br /> (7.9 cm79 mm <br />0.079 m <br />) +
pendulous +, spreading +  and erect +
stout +  and slender +
0.7 cm7 mm <br />0.007 m <br /> (1.8 cm18 mm <br />0.018 m <br />) +
Wedge-leaf willow +
N.W.T. +, Yukon +, Alaska +, e Asia (Chukotka) +, e Asia (Russian Far East) +  and e Asia (e Siberia) +
10-900 m +
black +  and brown +
0.11 cm1.1 mm <br />0.0011 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
pistillate +  and staminate +
bisexual +  and unisexual +
spherical +
Stony or gravelly substrates on talus, rocky outcrops, dry, stony tundra, sandy and moss tundra +
straight +
unbranched +  and spicate +
subterminal +  and axillary +
membranaceous +
1.9 cm19 mm <br />0.019 m <br /> (5.2 cm52 mm <br />0.052 m <br />) +
1 cm10 mm <br />0.01 m <br /> (2.8 cm28 mm <br />0.028 m <br />) +
arranged +  and alternate +
marcescent +
deciduous +
long-silky +
revolute +  and flat +
2-7[-10]-carpellate +
streaky +  and patchy +
villous +, pilose +  and glabrous +
pyriform +  and obclavate +
glandular-dotted +
flat;convex;flat;convex +
0.4 cm4 mm <br />0.004 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
Flowering mid Jun-late Jul (early Aug). +
Spisok Rast. Gerb. Fl. S.S.S.R. Bot. Inst. Vsesoyuzn. Akad. Nauk +
overlapping +
distinct +
non-papillate +
cylindrical +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.14 cm1.4 mm <br />0.0014 m <br />) +
caducous +  and persistent +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.18 cm1.8 mm <br />0.0018 m <br />) +
persistent +  and deciduous +
ferruginous +  and white +
Salix sphenophylla subsp. pseudotorulosa +
Salix sphenophylla +
Salix sect. Diplodictyae +
species +
pointed +
sympodial +, branching +  and heterophyllous +
plant +, forming +  and not clonal +