Salix pentandra

Linnaeus

Sp. Pl. 2: 1016. 1753.

Common names: Bay-leaf or bay or laurel willow
WeedyIntroduced
Treatment appears in FNA Volume 7. Treatment on page 44. Mentioned on page 23, 27, 39, 43, 46.

Shrubs or trees, 5–15 m. Stems: branches flexible at base, brownish or yellow-green, highly glossy, glabrous; branchlets yellow-green, redbrown, or brownish, glossy, glabrous. Leaves: stipules absent or rudimentary on early ones, rudimentary or foliaceous on late ones, apex rounded; petiole deeply to shallowly grooved adaxially, 5–15 mm, with pairs or clusters of spherical glands distally or throughout, glabrous adaxially; largest medial blade hypostomatous, narrowly elliptic, elliptic, or lanceolate, 50–135 × 20–50 mm, 2–4 times as long as wide, base convex, margins slightly revolute or flat, serrulate, apex acuminate, abaxial surface pale not glaucous, glabrous, adaxial highly glossy, glabrous; proximal blade margins entire or serrulate; juvenile blade reddish, glabrous abaxially. Catkins: staminate 27–81 × 9–13 mm, flowering branchlet 9–21 mm; pistillate moderately to densely flowered, slender or stout, 29–68 × 7–15 mm, flowering branchlet 9–42 mm; floral bract 2–4 mm, apex acute or rounded to truncate, entire or toothed, abaxially sparsely hairy (mainly proximally), hairs wavy or straight. Staminate flowers: abaxial nectary 0.6–1.7 mm, adaxial nectary square, ovate, or oblong, 0.5–1.5 mm, nectaries distinct or ± connate and cupshaped; stamens 4–10; filaments distinct, hairy on proximal 1/2; anthers ellipsoid or globose, 0.5–0.6 mm. Pistillate flowers: (abaxial nectary present or absent), adaxial nectary oblong, square, or ovate, 0.4–0.8 mm, (nectaries distinct or connate and shallowly cupshaped), shorter than or equal to stipe; stipe 0.5–1.6 mm; ovary pyriform, beak bulged below or tapering to styles; ovules 18–22 per ovary; styles connate or distinct, 0.4–0.6 mm; stigmas flat, abaxially non-papillate with rounded tip, or slenderly cylindrical, 0.4–0.6 mm. Capsules 6–9 mm. 2n = 76.


Phenology: Flowering late May-mid Jun.
Habitat: Shores of streams and lakes, marshes, roadsides, waste places
Elevation: 0-2300 m

Distribution

V7 34-distribution-map.gif

Introduced; Alta., B.C., Man., N.B., Nfld. and Labr. (Nfld.), N.S., Ont., Que., Sask., Alaska, Colo., Conn., D.C., Ill., Iowa, Ky., Maine, Md., Mass., Minn., Mont., Nebr., N.H., N.J., N.Y., N.C., Ohio, Pa., R.I., S.Dak., Vt., Va., Wis., Wyo., Eurasia

Discussion

The Ohio occurrence is based on information from T. Cooperrider (pers. comm.).

Only pistillate plants of Salix pentandra are known to occur in the flora area.

Selected References

None.

Lower Taxa

None.

... more about "Salix pentandra"
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.17 cm1.7 mm <br />0.0017 m <br />) +
glabrous +  and not glaucous +
ovate +, square +  and oblong +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.08 cm0.8 mm <br />8.0e-4 m <br />) +
reddish turning yellow +  and yellow +
globose +  and ellipsoid +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.06 cm0.6 mm <br />6.0e-4 m <br />) +
straight +
Rounded (?) +, Acute (?) +  and Acuminate (?) +
George W. Argus +
Linnaeus +
tapering +
ferruginous +  and white +
serrulate +  and entire +
toothed +  and 2-fid +
persistent +  and deciduous +
yellow-green +  and brownish +
flowered +  and sessile +
subglobose +
slender +  and stout +
0.9 cm9 mm <br />0.009 m <br /> (4.2 cm42 mm <br />0.042 m <br />) +
0.6 cm6 mm <br />0.006 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
pistillate +  and moderately densely flowered +
2.9 cm29 mm <br />0.029 m <br /> (6.8 cm68 mm <br />0.068 m <br />) +
pendulous +, spreading +  and erect +
stout +  and slender +
0.7 cm7 mm <br />0.007 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
Bay-leaf or bay or laurel willow +
Alta. +, B.C. +, Man. +, N.B. +, Nfld. and Labr. (Nfld.) +, N.S. +, Ont. +, Que. +, Sask. +, Alaska +, Colo. +, Conn. +, D.C. +, Ill. +, Iowa +, Ky. +, Maine +, Md. +, Mass. +, Minn. +, Mont. +, Nebr. +, N.H. +, N.J. +, N.Y. +, N.C. +, Ohio +, Pa. +, R.I. +, S.Dak. +, Vt. +, Va. +, Wis. +, Wyo. +  and Eurasia +
0-2300 m +
greenish +  and tawny +
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
pistillate +  and staminate +
bisexual +  and unisexual +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
spherical +
Shores of streams and lakes, marshes, roadsides, waste places +
white and ferruginous +  and white +
wavy +, toothed +  and entire +
unbranched +  and spicate +
subterminal +  and axillary +
membranaceous +
5 cm50 mm <br />0.05 m <br /> (13.5 cm135 mm <br />0.135 m <br />) +
lanceolate +  and elliptic +
2 cm20 mm <br />0.02 m <br /> (5 cm50 mm <br />0.05 m <br />) +
arranged +  and alternate +
marcescent +
deciduous +
flat +  and revolute +
connate +  and distinct +
rudimentary +
2-7[-10]-carpellate +
pyriform +
glandular-dotted +
0.5 cm5 mm <br />0.005 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
Flowering late May-mid Jun. +
overlapping +
distinct +
Weedy +  and Introduced +
branched +, sympodial +, monopodial +  and branching +
non-papillate +
cylindrical +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.06 cm0.6 mm <br />6.0e-4 m <br />) +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.16 cm1.6 mm <br />0.0016 m <br />) +
caducous +  and persistent +
distinct +  and connate +
tapering +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.06 cm0.6 mm <br />6.0e-4 m <br />) +
persistent +  and deciduous +
ferruginous +  and white +
Salix sect. Pentandrae +
Salix pentandra +
Salix sect. Salicaster +
species +
rounded +
sympodial +, branching +  and heterophyllous +
tree +  and shrub +