Salix lasiandra var. lasiandra

Common names: Pacific willow
Endemic
Synonyms: Salix lasiandra var. lyallii (Andersson) Little Salix lasiandra var. macrophylla Raup Salix lasiandra var. recomponens
Treatment appears in FNA Volume 7. Treatment on page 47. Mentioned on page 46, 48.

Leaves: stipules sometimes rudimentary on early ones, foliaceous on late ones, apex convex; petiole (2–) 4–30 mm, with clusters of spherical or foliaceous glands distally; largest medial blade usually hypostomatous or hemiamphistomatous (rarely amphistomatous), narrowly oblong, very narrowly elliptic, narrowly elliptic, lanceolate, narrowly lanceolate, or oblanceolate, base convex to rounded, abaxial surface usually glaucous (rarely not glaucous), glabrous or glabrescent, hairs white, sometimes also ferruginous, straight or wavy (secondary-veins protruding abaxially and adaxially). Catkins: staminate 21–78 × 9–14 mm, flowering branchlet 5–24 mm; pistillate moderately to very densely flowered, slender, stout, or subglobose, 18.5–103 × 6–17 mm, flowering branchlet 6–56 mm; floral bract 1.7–4 mm. Staminate flowers: abaxial nectary 0.4–0.6 mm, adaxial nectary 0.2–0.5 mm, nectaries distinct. Pistillate flowers: adaxial nectary 0.2–0.6 mm; stipe 0.8–2 mm; ovules 16–24 per ovary; styles 0.2–0.8 mm. 2n = 76.


Phenology: Flowering late Mar-early Jun.
Habitat: Thickets, silty, sandy to gravelly alluvium along streams
Elevation: 0-2700 m

Distribution

V7 38-distribution-map.gif

Alta., B.C., Man., N.W.T., Sask., Yukon, Alaska, Ariz., Calif., Colo., Idaho, Mont., Nev., N.Mex., Oreg., Utah, Wash.

Discussion

Hybrids:

Variety lasiandra forms natural hybrids with Salix eastwoodiae. Hybrids with S. gooddingii have been reported (C. K. Schneider 1921), but no convincing specimens have been seen.

Selected References

None.

Lower Taxa

None.

0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.06 cm0.6 mm <br />6.0e-4 m <br />) +
glabrescent +, glabrous +  and glaucous +
ovate +  and square +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.06 cm0.6 mm <br />6.0e-4 m <br />) +
long-silky;pilose;long-silky;pilose;glabrous +
reddish turning yellow +  and yellow +
globose +, obovoid +, cylindrical +  and ellipsoid +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
George W. Argus +
Bentham +
convex +  and rounded +
tapering +
yellowish green +  and reddish +
ferruginous +  and white +
serrulate +  and entire +
glandular-dotted +
glabrous +, long-silky +  and villous +
toothed +  and 2-fid +
persistent +  and deciduous +
redbrown +, gray-brown +  and yellowbrown +
flexible +  and highly brittle +
pilose +  and glabrescent +
flowered +  and pistillate +
velvety +, villous +, pilose +  and glabrous +
subglobose +
0.6 cm6 mm <br />0.006 m <br /> (5.6 cm56 mm <br />0.056 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (1.1 cm11 mm <br />0.011 m <br />) +
flowered +, pistillate +  and staminate +
1.85 cm18.5 mm <br />0.0185 m <br /> (10.3 cm103 mm <br />0.103 m <br />) +
pendulous +, spreading +  and erect +
subglobose +
slender +
0.6 cm6 mm <br />0.006 m <br /> (1.7 cm17 mm <br />0.017 m <br />) +
Pacific willow +
Alta. +, B.C. +, Man. +, N.W.T. +, Sask. +, Yukon +, Alaska +, Ariz. +, Calif. +, Colo. +, Idaho +, Mont. +, Nev. +, N.Mex. +, Oreg. +, Utah +  and Wash. +
0-2700 m +
greenish +  and tawny +
0.17 cm1.7 mm <br />0.0017 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
pistillate +  and staminate +
0 cm0 mm <br />0 m <br /> (0.04 cm0.4 mm <br />4.0e-4 m <br />) +
bisexual +  and unisexual +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.08 cm0.8 mm <br />8.0e-4 m <br />) +
spherical +
Thickets, silty, sandy to gravelly alluvium along streams +
ferruginous +  and white +
straight +
unbranched +  and spicate +
subterminal +  and axillary +
membranaceous +
hemiamphistomatous +  and hypostomatous +
5.3 cm53 mm <br />0.053 m <br /> (17 cm170 mm <br />0.17 m <br />) +
oblanceolate +, lanceolate +, elliptic +  and oblong +
0.9 cm9 mm <br />0.009 m <br /> (3.1 cm31 mm <br />0.031 m <br />) +
arranged +  and alternate +
marcescent +
deciduous +
rudimentary +
2-7[-10]-carpellate +
pyriform +
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
glandular-dotted +
pilose +  and glabrous +
0.4 cm4 mm <br />0.004 m <br /> (3 cm30 mm <br />0.03 m <br />) +
Flowering late Mar-early Jun. +
Pl. Hartw., +
overlapping +
distinct +
branched +, sympodial +, monopodial +  and branching +
non-papillate +
cylindrical +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.04 cm0.4 mm <br />4.0e-4 m <br />) +
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
caducous +  and persistent +
tapering +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.08 cm0.8 mm <br />8.0e-4 m <br />) +
persistent +  and deciduous +
ferruginous +  and white +
Salix lasiandra var. lyallii +, Salix lasiandra var. macrophylla +  and Salix lasiandra var. recomponens +
Salix lasiandra var. lasiandra +
Salix lasiandra +
variety +
rounded +
sympodial +, branching +  and heterophyllous +
tree +  and shrub +