Salix hastata

Linnaeus

Sp. Pl. 2: 1017. 1753.

Common names: Halberd willow
Illustrated
Synonyms: Salix farriae var. walpolei Coville & C. R. Ball Salix hastata subsp. subintegrifolia (Floderus) Floderus Salix walpolei
Treatment appears in FNA Volume 7. Treatment on page 116. Mentioned on page 103, 115, 117.

Plants 0.2–4 m. Stems: branches reddish-brown, not glaucous, (slightly glossy), pilose; branchlets yellowbrown or redbrown, villous or pilose. Leaves: stipules foliaceous, apex acute to acuminate; petiole convex to flat, or shallowly grooved adaxially, 2–6 (–9) mm, pilose or villous adaxially; largest medial blade narrowly to broadly elliptic or narrowly ovate to ovate, 25–92 × 10–45 mm, 1.5–2.6 (–3.4) times as long as wide, base convex, cuneate, or rounded, margins slightly revolute or flat, shallowly serrulate or entire, apex acuminate, acute, or convex, abaxial surface glaucous, sparsely pubescent, hairs wavy, adaxial dull to slightly glossy, pilose, sparsely pubescent or glabrous, midrib hairy, (hairs white and ferruginous); proximal blade margins entire or finely serrulate; juvenile blade sometimes reddish, sparsely pubescent abaxially, hairs white, sometimes also ferruginous. Catkins flowering as leaves emerge; staminate slender, stout, or subglobose, 14.5–34.5 × 8–12 mm, flowering branchlet 1–7 mm; pistillate moderately densely or loosely flowered, slender or stout, 21–59 × 6–16 mm, flowering branchlet 1.5–9 mm; floral bract brown or bicolor, 1.2–1.8 mm, apex acute to rounded, abaxially glabrate to hairy, hairs straight to wavy. Staminate flowers: adaxial nectary oblong or square, 0.3–0.7 mm; filaments distinct or basally connate, glabrous; anthers purple turning yellow, 0.4–0.6 mm. Pistillate flowers: adaxial nectary square or obovate, 0.3–0.6 mm, usually shorter than stipe; stipe 0.4–1.2 mm; ovary pyriform, glabrous, beak gradually tapering to styles; ovules 12–22 per ovary; styles connate (sometimes distinct 1/2 their lengths), 0.2–0.5 mm; stigmas flat, abaxially non-papillate with rounded tip, or broadly cylindrical, or 2 plump lobes, 0.2–0.32–0.44 mm. Capsules 3.2–8 mm. 2n = 38.


Phenology: Flowering early Jun-late Jul.
Habitat: Sandy and gravelly river bars and floodplains, lakeshores, sand dunes and blowouts, Dryas tundra, alpine sedge meadows, balsam poplar thickets, openings in upland spruce-willow forests
Elevation: 0-1200 m

Distribution

V7 118-distribution-map.gif

N.W.T., Yukon, Alaska, Eurasia (Norway), Eurasia (Russia), Eurasia (Siberia)

Discussion

Salix hastata is characterized by branches pilose with short, curved hairs; juvenile and mature leaves with white or ferruginous hairs adaxially, glaucous or not abaxially; and ovaries often reddish. See 61. S. barclayi and 64. S. farriae.

Subspecies subintegrifolia, characterized by entire or subentire leaf margins, is recognized in Flora Nordica as the major northern Eurasian race of Salix hastata, and is described as occurring across Russia into northwestern North America (B. Jonsell and T. Karlsson 2000+, vol. 1). Because leaf marginal toothing is highly variable throughout the species range (E. Hultén 1967), the subspecies is not recognized here or in Russia (A. K. Skvortsov 1999).

Hybrids:

Salix hastata forms natural hybrids with S. barclayi.

Selected References

None.

Lower Taxa

None.

"-0.44mm" is not declared as a valid unit of measurement for this property.

... more about "Salix hastata"
21 +, 4 +, 1 +, 16 +  and 29 +
pubescent +  and glaucous +
obovate +, square +  and oblong +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.06 cm0.6 mm <br />6.0e-4 m <br />) +
glabrous;pubescent;pilose +
dull +  and slightly glossy +
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 />) +
abaxially glabrate +  and hairy +
Acute (?) +  and Rounded (?) +
intermediate +
George W. Argus +
Linnaeus +
rounded +, cuneate +  and convex +
Salix tribe Hastatae +
tapering +
ferruginous +  and white +
serrulate +  and entire +
toothed +  and 2-fid +
persistent +
reddish-brown +
pilose +  and not glaucous +
flowered +  and pistillate +
pilose +  and villous +
subglobose +
stout +  and slender +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
intermediate +
0.32 cm3.2 mm <br />0.0032 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
pendulous +, spreading +  and erect +
Halberd willow +
N.W.T. +, Yukon +, Alaska +, Eurasia (Norway) +, Eurasia (Russia) +  and Eurasia (Siberia) +
0-1200 m +
connate +  and distinct +
bicolor +  and brown +
0.12 cm1.2 mm <br />0.0012 m <br /> (0.18 cm1.8 mm <br />0.0018 m <br />) +
pistillate +  and staminate +
bisexual +  and unisexual +
Sandy and gravelly river bars and floodplains, lakeshores, sand dunes and blowouts, Dryas tundra, alpine sedge meadows, balsam poplar thickets, openings in upland spruce-willow forests +
ferruginous +  and white +
straight +
unbranched +  and spicate +
subterminal +  and axillary +
membranaceous +
hemiamphistomatous +, amphistomatous +  and hypostomatous +
2.5 cm25 mm <br />0.025 m <br /> (9.2 cm92 mm <br />0.092 m <br />) +
narrowly ovate +  and ovate +
1 cm10 mm <br />0.01 m <br /> (4.5 cm45 mm <br />0.045 m <br />) +
arranged +  and alternate +
marcescent +
deciduous +
entire +  and serrulate +
flat +  and revolute +
2-7[-10]-carpellate +
pyriform +
0.6 cm6 mm <br />0.006 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
glandular-dotted +
villous +  and pilose +
convex;flat +
0.2 cm2 mm <br />0.002 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
Flowering early Jun-late Jul. +
overlapping +
distinct +
Illustrated +
decumbent;erect +
non-papillate +
cylindrical +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.12 cm1.2 mm <br />0.0012 m <br />) +
caducous +  and persistent +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
persistent +  and deciduous +
Salix farriae var. walpolei +, Salix hastata subsp. subintegrifolia +  and Salix walpolei +
Salix hastata +
Salix sect. Hastatae +
species +
rounded +
sympodial +, branching +  and heterophyllous +