Salix richardsonii

Hooker

Fl. Bor.-Amer. 2: 147, plate 182. 1838.

Common names: Richardson’s willow
Illustrated
Synonyms: Salix lanata subsp. richardsonii (Hooker) A. K. Skvortsov Salix richardsonii var. mckeandii Polunin
Treatment appears in FNA Volume 7. Treatment on page 144. Mentioned on page 95, 114, 115, 145.

Plants 0.3–6.5 m. Stems: branches redbrown, yellowbrown, or violet, not to strongly glaucous (slightly or highly glossy), villous to glabrescent with persistent patches of hairs; branchlets redbrown or yellowbrown, pilose to densely villous, (buds caprea-type, scale inner membrane free, separating from outer layer). Leaves: stipules (sometimes marcescent), foliaceous, (3–12–35 mm, 1.7–3.6–6.6 times as long as wide, lanceolate or narrowly elliptic, sometimes ovate or oval, base broad, abruptly tapering), apex acuminate or acute; petiole convex to flat or shallowly grooved adaxially, 2–7.3–27 mm, villous to glabrescent adaxially; largest medial blade broadly to narrowly elliptic, or obovate, 23–45–100 × 10–22–55 mm, 1.2–2.2–4.2 times as long as wide, base cuneate, convex, or concave, margins slightly revolute or flat, entire or serrulate, apex acute, acuminate, or convex, abaxial surface glaucous, glabrous or pilose, hairs (white, sometimes also ferruginous), curved, adaxial slightly glossy, moderately densely villous or pilose to glabrescent; proximal blade margins usually entire, sometimes serrulate; juvenile blade yellowish green, abaxially densely villous or pilose, sometimes glabrous, hairs white, sometimes also ferruginous. Catkins flowering before leaves emerge; staminate stout or subglobose, 22–53 × 16–24 mm, flowering branchlet 0 mm; pistillate densely flowered, slender or stout, 25–69 (–85 in fruit) × 13–20 mm, flowering branchlet 0–2 mm; floral bract brown or black, 2.4–3.2 mm, apex acute, rounded, or retuse, abaxially moderately densely hairy, hairs straight. Staminate flowers: adaxial nectary narrowly oblong to oblong, 0.7–1.8 mm; filaments distinct to connate ca. 1/2 their lengths, glabrous; anthers purple turning yellow, ellipsoid to shortly cylindrical, 0.5–0.8 mm. Pistillate flowers: adaxial nectary narrowly oblong, oblong, or flask-shaped, 0.6–1.4 mm (2+-lobed), longer than stipe; stipe 0.4–1 mm; ovary pyriform, beak gradually tapering to styles; ovules 22–37 per ovary; styles 1–2.8 mm; stigmas slenderly cylindrical, 0.32–0.63–0.86 mm. Capsules 4.5–6.8 mm. 2n = 38.


Phenology: Flowering late May-early Jul.
Habitat: Arctic, subarctic, subalpine and boreal, stream terraces and floodplains, open forests, wet sedge meadows, fens, drumlin fields, gravel ridges, bogs, cliff ledges, snowbeds, silt, sand and gravel, calcareous or igneous substrates
Elevation: 10-1800 m

Distribution

V7 160-distribution-map.gif

B.C., Man., N.W.T., Nunavut, Yukon, Alaska, e Asia (Chukotka), e Asia (Kamchatka), e Asia (Russia [Anadyr]), e Asia (e Siberia)

Discussion

Hybrids:

Salix richardsonii forms natural hybrids with S. barclayi and S. calcicola.

Selected References

None.

Lower Taxa

None.

"-100mm" is not declared as a valid unit of measurement for this property."-55mm" is not declared as a valid unit of measurement for this property."-27mm" is not declared as a valid unit of measurement for this property."-0.86mm" is not declared as a valid unit of measurement for this property.

... more about "Salix richardsonii"
21 +, 4 +, 1 +, 16 +  and 29 +
pilose +, glabrous +  and glaucous +
flask--shaped +, oblong +  and narrowly oblong +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.14 cm1.4 mm <br />0.0014 m <br />) +
pilose;glabrescent +
purple turning yellow +
ellipsoid +  and shortly cylindrical +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.08 cm0.8 mm <br />8.0e-4 m <br />) +
Retuse (?) +, Rounded (?) +, Acute (?) +, Convex (?) +  and Acuminate (?) +
George W. Argus +
Hooker +
concave +, convex +  and cuneate +
Lanatae +
tapering +
yellowish green +
ferruginous +  and white +
serrulate +  and entire +
glabrous +, pilose +  and villous +
toothed +  and 2-fid +
persistent +
violet +, yellowbrown +  and redbrown +
villous +  and glabrescent +
flowered +  and pistillate +
pilose +  and densely villous +
subglobose +
stout +  and slender +
0 cm0 mm <br />0 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
intermediate +
0.45 cm4.5 mm <br />0.0045 m <br /> (0.68 cm6.8 mm <br />0.0068 m <br />) +
pendulous +, spreading +  and erect +
Richardson’s willow +
B.C. +, Man. +, N.W.T. +, Nunavut +, Yukon +, Alaska +, e Asia (Chukotka) +, e Asia (Kamchatka) +, e Asia (Russia [Anadyr]) +  and e Asia (e Siberia) +
10-1800 m +
distinct +  and connate +
black +  and brown +
0.24 cm2.4 mm <br />0.0024 m <br /> (0.32 cm3.2 mm <br />0.0032 m <br />) +
pistillate +  and staminate +
bisexual +  and unisexual +
Arctic, subarctic, subalpine and boreal, stream terraces and floodplains, open forests, wet sedge meadows, fens, drumlin fields, gravel ridges, bogs, cliff ledges, snowbeds, silt, sand and gravel, calcareous or igneous substrates +
ferruginous +  and white +
straight +  and curved +
flattened +
unbranched +  and spicate +
subterminal +  and axillary +
membranaceous +
hemiamphistomatous +, amphistomatous +  and hypostomatous +
obovate +  and elliptic +
arranged +  and alternate +
marcescent +
deciduous +
serrulate +  and entire +
flat +  and revolute +
2-7[-10]-carpellate +
pyriform +
persistent +
glandular-dotted +
villous +  and glabrescent +
convex;flat +
Flowering late May-early Jul. +
Fl. Bor.-Amer. +
overlapping +
distinct +
Illustrated +
decumbent;erect +
non-papillate +
cylindrical +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
caducous +  and persistent +
distinct +  and connate +
0.1 cm1 mm <br />0.001 m <br /> (0.28 cm2.8 mm <br />0.0028 m <br />) +
persistent +  and deciduous +
Salix lanata subsp. richardsonii +  and Salix richardsonii var. mckeandii +
Salix richardsonii +
Salix sect. Lanatae +
species +
pointed +  and rounded +
sympodial +, branching +  and heterophyllous +