Salix prolixa

Andersson

Monogr. Salicum, 94, plate 5, fig. 52. 1867.

Common names: Mackenzie’s willow
IllustratedEndemic
Synonyms: Salix cordata var. mackenzieana Hooker Salix eriocephala subsp. mackenzieana (Hooker) Dorn Salix mackenzieana (Hooker) Barratt ex Andersson Salix mackenzieana var. macrogemma C. R. Ball Salix rigida var. mackenzieana (Hooker) Cronquist Salix rigida var. macrogemma (C. R. Ball) Cronquist
Treatment appears in FNA Volume 7. Treatment on page 125. Mentioned on page 104.

Shrubs, 1–5 m. Stems: branches gray-brown or redbrown, not or weakly glaucous, (with sparkling wax crystals), glabrous or moderately villous; branchlets yellow-green, or yellowbrown to redbrown, glabrous or sparsely to moderately densely velvety, (inner membranaceous bud-scale layer free, separating from outer layer). Leaves: stipules foliaceous, apex acuminate to rounded; petiole convex to flat adaxially, 6–12 mm, glabrous or pilose adaxially; largest medial blade narrowly oblong, narrowly elliptic, lanceolate, or obovate, 50–150 × 10–53 mm, 2.4–4.5 times as long as wide, base cordate, subcordate, rounded, or convex, margins flat, serrate, serrulate, or spinulose-serrulate, apex acuminate to acute, abaxial surface glaucous, glabrous, adaxial dull, glabrous, pilose, or sparsely pubescent, (sometimes adaxial stomata only along veins or apically); proximal blade margins entire; juvenile blade reddish or yellowish green, glabrous, pilose or sparsely long-silky abaxially, hairs white. Catkins flowering as leaves emerge; staminate slender or stout, 16–41 × 8–12 mm, flowering branchlet 0.5–3 mm; pistillate moderately densely to loosely flowered, slender or stout, 19–66 × 8–18 mm, flowering branchlet 0.5–6 mm; floral bract brown, 0.8–1.6 mm, apex acute or rounded, abaxially hairy mainly proximally, hairs straight or wavy. Staminate flowers: adaxial nectary oblong to narrowly oblong, 0.8–1 mm; filaments distinct or connate less than 1/2 their lengths, glabrous; anthers purple turning yellow, (ellipsoid), 0.5–0.6 mm. Pistillate flowers: adaxial nectary oblong, square, or flask-shaped, 0.3–0.8 mm, shorter than stipe; stipe 1.3–4.2 mm; ovary pyriform, glabrous, beak sometimes slightly bulged below styles; ovules 12–22 per ovary; styles 0.3–0.7 mm; stigmas flat, abaxially non-papillate with rounded tip, or 2 plump lobes, or slenderly cylindrical, 0.16–0.28–0.4 mm. Capsules 4–6 mm.


Phenology: Flowering late Mar-late Jun.
Habitat: Along streams, lakes, springs, marsh margins, sandy-gravel, sandy or silty substrates
Elevation: 100-2300 m

Distribution

V7 130-distribution-map.gif

Alta., B.C., N.W.T., Yukon, Alaska, Calif., Idaho, Mont., Nev., Oreg., Wash., Wyo.

Discussion

Selected References

None.

Lower Taxa

None.

"-0.4mm" is not declared as a valid unit of measurement for this property.

... more about "Salix prolixa"
21 +, 4 +, 1 +, 16 +  and 29 +
114 +, 95 +, 76 +, 57 +  and 38 +
glabrous +  and glaucous +
flask--shaped +, square +, oblong +  and narrowly oblong +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.08 cm0.8 mm <br />8.0e-4 m <br />) +
pubescent;pilose;pubescent;pilose;glabrous +
purple turning yellow +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.06 cm0.6 mm <br />6.0e-4 m <br />) +
Rounded (?) +, Acute (?) +  and Acuminate (?) +
George W. Argus +
Andersson +
convex +, rounded +, subcordate +  and cordate +
Salix sect. Vetrix +
tapering +
yellowish green +  and reddish +
ferruginous +  and white +
long-silky +, pilose +  and glabrous +
toothed +  and 2-fid +
persistent +
redbrown +  and gray-brown +
villous +, glabrous +, punct +  and glaucous +
flowered +  and pistillate +
subglobose to globose +  and stout +
glabrous or +  and sparsely moderately densely velvety +
stout +  and slender +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
intermediate +
0.4 cm4 mm <br />0.004 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
pistillate +  and staminate +
pendulous +, spreading +  and erect +
staminate +
Mackenzie’s willow +
Alta. +, B.C. +, N.W.T. +, Yukon +, Alaska +, Calif. +, Idaho +, Mont. +, Nev. +, Oreg. +, Wash. +  and Wyo. +
100-2300 m +
connate +  and distinct +
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.16 cm1.6 mm <br />0.0016 m <br />) +
pistillate +  and staminate +
bisexual +  and unisexual +
Along streams, lakes, springs, marsh margins, sandy-gravel, sandy or silty substrates +
straight +
unbranched +  and spicate +
subterminal +  and axillary +
membranaceous +
hemiamphistomatous +, amphistomatous +  and hypostomatous +
5 cm50 mm <br />0.05 m <br /> (15 cm150 mm <br />0.15 m <br />) +
obovate +, lanceolate +, elliptic +  and oblong +
1 cm10 mm <br />0.01 m <br /> (5.3 cm53 mm <br />0.053 m <br />) +
arranged +  and alternate +
marcescent +
deciduous +
cylindrical +  and rounded +
spinulose-serrulate +, serrulate +  and serrate +
2-7[-10]-carpellate +
pyriform +
glandular-dotted +
pilose +  and glabrous +
convex;flat +
0.6 cm6 mm <br />0.006 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
Flowering late Mar-late Jun. +
Monogr. Salicum, +
overlapping +
distinct +
Illustrated +  and Endemic +
decumbent;erect +
non-papillate +
cylindrical +
0.13 cm1.3 mm <br />0.0013 m <br /> (0.42 cm4.2 mm <br />0.0042 m <br />) +
caducous +  and persistent +
distinct +  and connate +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.07 cm0.7 mm <br />7.0e-4 m <br />) +
persistent +  and deciduous +
Salix cordata var. mackenzieana +, Salix eriocephala subsp. mackenzieana +, Salix mackenzieana +, Salix mackenzieana var. macrogemma +, Salix rigida var. mackenzieana +  and Salix rigida var. macrogemma +
Salix prolixa +
Salix sect. Cordatae +
species +
cylindrical +  and rounded +
plump +
sympodial +, branching +  and heterophyllous +