Salix sericea

Marshall

Arbust Amer., 140. 1785.

Common names: Silky willow
WeedyIllustratedEndemic
Synonyms: Salix coactilis Fernald
Treatment appears in FNA Volume 7. Treatment on page 157. Mentioned on page 27, 99, 121, 142, 153.

Plants sometimes forming clones by stem fragmentation. Stems: branches (highly brittle at base), gray-brown or violet, not glaucous, tomentose to glabrescent; branchlets redbrown, violet, or mottled yellowbrown, sparsely to densely velvety. Leaves: stipules absent or rudimentary on early ones, late ones 1.2–4 mm, apex acute or acuminate; petiole convex to flat, or shallowly grooved adaxially, 3.5–12 (–21) mm, (sometimes 2 spherical glands distally), velvety adaxially; largest medial blade lorate, narrowly oblong, or narrowly elliptic, (48–) 54–82–100 (–125) × (7–) 9–16.7–25 mm, base cuneate or convex, margins flat, serrulate or crenulate, apex acute, acuminate, or convex, abaxial surface glaucous (sometimes obscured by hairs), densely short-silky, hairs straight, adaxial dull, sparsely pubescent to glabrescent; proximal blade margins entire; juvenile blade reddish or yellowish green, very densely short-silky abaxially, hairs white, sometimes also ferruginous. Catkins flowering as or just before leaves emerge; staminate stout, 13.5–40 × 4–9 mm, flowering branchlet 0–2 mm; pistillate loosely to moderately densely flowered, slender to stout, 18–43 × 5–12 mm, flowering branchlet 1–3 mm; floral bract dark-brown, black, or bicolor, 0.8–1.5 mm, apex rounded, abaxially hairy, hairs straight or wavy. Staminate flowers: adaxial nectary ovate to oblong, 0.3–0.8 mm; filaments distinct or connate less than 1/2 their lengths; anthers purple turning yellow, 0.4–0.6 mm. Pistillate flowers: adaxial nectary oblong, ovate, or flask-shaped, 0.4–0.7 mm; ovary ovoid, beak abruptly tapering to styles; ovules 6 per ovary; styles 0.2–0.4 mm. Capsules 2.5–4 mm.


Phenology: Flowering early Mar-early Jun.
Habitat: Wet, boggy shores, sandy terraces, ledges along streams, low woods, sedge meadows, acid bogs, open seepages, rocky, silty, sandy, or peaty substrates, possibly also on serpentine soils
Elevation: 5-1300 m

Distribution

V7 183-distribution-map.gif

N.B., N.S., Que., Ala., Ark., Conn., Del., D.C., Ga., Ill., Ind., Iowa, Ky., Maine, Md., Mass., Mich., Mo., N.H., N.J., N.Y., N.C., Ohio, Pa., R.I., S.C., Tenn., Vt., Va., W.Va., Wis.

Discussion

Some specimens of Salix sericea are difficult to separate from S. petiolaris (G. W. Argus 1986). Salix sericea can be distinguished from S. petiolaris in having branches highly brittle at base, stipules on early leaves rudimentary or absent, on late leaves usually foliaceous, juvenile blades usually with white hairs, rarely some ferruginous, ovaries ovoid, beaks abruptly tapering to styles, and capsules 2.5–4 mm; S. petiolaris has branches flexible at base, stipules on all leaves absent or rudimentary, juvenile blades usually with conspicuous ferruginous hairs, ovaries pyriform, beaks gradually tapering to styles, and capsules 5–9 mm.

See 68. Salix eriocephala for comments on differences.

Hybrids:

Salix sericea forms natural hybrids with S. eriocephala and S. petiolaris. Reports of hybrids with S. humilis (C. K. Schneider 1921; M. L. Fernald 1950) are not based on convincing specimens.

Selected References

None.

Lower Taxa

None.

"-100mm" is not declared as a valid unit of measurement for this property."-100mm" is not declared as a valid unit of measurement for this property."-25mm" is not declared as a valid unit of measurement for this property."-0.26mm" is not declared as a valid unit of measurement for this property.

... more about "Salix sericea"
21 +, 4 +, 1 +, 16 +  and 29 +
114 +, 95 +, 76 +, 57 +  and 38 +
short-silky +  and glaucous +
flask--shaped +, ovate +  and oblong +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.07 cm0.7 mm <br />7.0e-4 m <br />) +
sparsely pubescent;glabrescent +
purple turning yellow +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.06 cm0.6 mm <br />6.0e-4 m <br />) +
Rounded (?) +, Convex (?) +, Acuminate (?) +  and Acute (?) +
George W. Argus +
Marshall +
convex +  and cuneate +
Griseae +
tapering +
yellowish green +  and reddish +
ferruginous +  and white +
short-silky +
toothed +  and 2-fid +
persistent +
pistillate +  and loosely moderately densely flowered +
1.8 cm18 mm <br />0.018 m <br /> (4.3 cm43 mm <br />0.043 m <br />) +
slender +  and stout +
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
intermediate +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
pendulous +, spreading +  and erect +
Silky willow +
N.B. +, N.S. +, Que. +, Ala. +, Ark. +, Conn. +, Del. +, D.C. +, Ga. +, Ill. +, Ind. +, Iowa +, Ky. +, Maine +, Md. +, Mass. +, Mich. +, Mo. +, N.H. +, N.J. +, N.Y. +, N.C. +, Ohio +, Pa. +, R.I. +, S.C. +, Tenn. +, Vt. +, Va. +, W.Va. +  and Wis. +
5-1300 m +
connate +  and distinct +
hairy +  and glabrous +
bicolor +, black +  and dark-brown +
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
pistillate +  and staminate +
bisexual +  and unisexual +
Wet, boggy shores, sandy terraces, ledges along streams, low woods, sedge meadows, acid bogs, open seepages, rocky, silty, sandy, or peaty substrates, possibly also on serpentine soils +
ferruginous +  and white +
straight +
unbranched +  and spicate +
subterminal +  and axillary +
membranaceous +
hemiamphistomatous +, amphistomatous +  and hypostomatous +
0.7 cm7 mm <br />0.007 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
elliptic +, oblong +  and lorate +
arranged +  and alternate +
marcescent +
deciduous +
crenulate +, serrulate +  and flat +
rudimentary +
2-7[-10]-carpellate +
short-silky +
1.2 cm12 mm <br />0.012 m <br /> (2.1 cm21 mm <br />0.021 m <br />) +
glandular-dotted +
convex;flat +
0.35 cm3.5 mm <br />0.0035 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
Flowering early Mar-early Jun. +
Arbust Amer., +
overlapping +
distinct +
Weedy +, Illustrated +  and Endemic +
violet +  and gray-brown +
decumbent;erect +
non-papillate +
cylindrical +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
caducous +  and persistent +
0.12 cm1.2 mm <br />0.0012 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
distinct +  and connate +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.04 cm0.4 mm <br />4.0e-4 m <br />) +
persistent +  and deciduous +
Salix coactilis +
Salix sericea +
Salix sect. Griseae +
species +
rounded +
sympodial +, branching +  and heterophyllous +