Salix vestita

Pursh

Fl. Amer. Sept. 2: 610. 1813.

Common names: Rock willow
Illustrated
Synonyms: Salix leiolepis Fernald Salix vestita subsp. leiolepis (Fernald) Argus Salix vestita var. psilophylla Fernald & H. St. John
Treatment appears in FNA Volume 7. Treatment on page 64. Mentioned on page 46, 61.

Plants 0.2–1.5 m. Stems erect; branches brownish or redbrown, (dull), glabrous, long-silky, or villous to glabrescent; branchlets yellowbrown or gray-brown, long-silky, pilose, or moderately densely villous. Leaves: stipules absent or rudimentary; petiole (shallowly to deeply grooved adaxially), 2–8 mm, (with 2 spherical glands distally, dark-brown, sometimes basilaminar, sparsely pubescent or glabrous adaxially); largest medial blade hypostomatous, (veins strongly impressed-reticulate), broadly elliptic, subcircular, or obovate, 18–67 × 10–40 mm, 1.1–2.3 times as long as wide, base rounded, convex, or subcordate, margins strongly revolute, crenate or subentire, apex rounded, convex, retuse, or toothed, abaxial surface sparsely to densely villous or long-silky, veins often with long, straight hairs, adaxial slightly glossy, glabrous or sparsely long-silky; proximal blade margins entire or crenate; juvenile blade (yellowish green), abaxially very densely long-silky. Catkins: staminate 13–48 × 4–6.5 (–8) mm, flowering branchlet 3–31 (–50) mm; pistillate densely flowered, slender or stout, 18–56 × 4–10 mm, flowering branchlet 3–27 (–40) mm; floral bract tawny, 0.8–1.6 mm, apex rounded, entire, abaxially densely hairy, hairs straight. Staminate flowers: abaxial nectary 0.6–0.8 mm, adaxial nectary narrowly oblong, 0.5–1.2 mm, nectaries connate and shallowly cupshaped, or distinct; filaments distinct, hairy on proximal 1/2; anthers ellipsoid or globose, 0.3–0.5 mm. Pistillate flowers: abaxial nectary (0–) 0.8–0.9 mm, adaxial nectary oblong, ovate, or narrowly oblong to almost filiform, 0.7–1.4 mm, shorter to longer than stipe, nectaries distinct or connate and cupshaped; stipe 0.4–1.2 mm; ovary pyriform or obnapiform, densely short-silky, hairs cylindrical, beak abruptly tapering to styles; ovules 13–15 per ovary; styles connate 1/2 their lengths to almost distinct, 0.2–0.4 mm; stigmas flat, abaxially non-papillate with rounded tip, slenderly cylindrical, or 2 plump lobes, 0.2–0.28–0.36 mm. Capsules 3–5 mm. 2n = 38.


Phenology: Flowering mid Jun-late Jul.
Habitat: Moist to dry open forests and rocky streamsides, in upper montane and subalpine zones, rarely alpine
Elevation: 0-2400 m

Distribution

V7 56-distribution-map.gif

Alta., B.C., Man., Nfld. and Labr., N.S., Nunavut, Ont., Que., Mont., Oreg., Wash., Asia (China [Xinjiang]), Asia (Mongolia), Asia (Russia), Asia (e), Asia (c Siberia)

Discussion

Salix vestita is an ancient amphiberingian species. Its distribution includes a series of isolated, disjunct populations in Central Siberia, the northern Rocky Mountains, the west coast of Hudson Bay, and the northeastern arctic and subarctic. Occurrence in Nunavut is on Akpatok Island in Ungava Bay and on the Belcher Islands in Hudson Bay. It may be extirpated in Washington.

The flowering and vegetative branchlets sometimes have relatively short internodes. In subsequent years, branches have the appearance of short shoots similar to those in Alnus. Short shoots do not appear on all branches or in all years. The formation of short shoots may be related to adverse growing conditions.

Selected References

None.

Lower Taxa

None.

"-0.36mm" is not declared as a valid unit of measurement for this property.

... more about "Salix vestita"
0 cm0 mm <br />0 m <br /> (0.08 cm0.8 mm <br />8.0e-4 m <br />) +
connate +  and distinct +
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.09 cm0.9 mm <br />9.0e-4 m <br />) +
long-silky +  and villous +
filiform +, oblong +  and ovate +
0.07 cm0.7 mm <br />7.0e-4 m <br /> (0.14 cm1.4 mm <br />0.0014 m <br />) +
long-silky;glabrous +
red turning yellow +
globose +  and ellipsoid +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
Rounded (?) +, Toothed (?) +, Retuse (?) +  and Convex (?) +
George W. Argus +
subcordate +, convex +  and rounded +
Salix sect. Chamaetia +
tapering +
crenate +  and entire +
toothed +  and 2-fid +
persistent +
redbrown +  and brownish +
villous +  and glabrescent +
2.7 cm27 mm <br />0.027 m <br /> (4 cm40 mm <br />0.04 m <br />) +
villous +, pilose +  and long-silky +
subglobose +  and globose +
0.3 cm3 mm <br />0.003 m <br /> (2.7 cm27 mm <br />0.027 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
flowered +, pistillate +  and staminate +
0.65 cm6.5 mm <br />0.0065 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
1.8 cm18 mm <br />0.018 m <br /> (5.6 cm56 mm <br />0.056 m <br />) +
pendulous +, spreading +  and erect +
stout +  and slender +
0.4 cm4 mm <br />0.004 m <br /> (1 cm10 mm <br />0.01 m <br />) +
Rock willow +
Alta. +, B.C. +, Man. +, Nfld. and Labr. +, N.S. +, Nunavut +, Ont. +, Que. +, Mont. +, Oreg. +, Wash. +, Asia (China [Xinjiang]) +, Asia (Mongolia) +, Asia (Russia) +, Asia (e) +  and Asia (c Siberia) +
0-2400 m +
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 +
spherical +
Moist to dry open forests and rocky streamsides, in upper montane and subalpine zones, rarely alpine +
white and ferruginous +  and white +
straight +
short-silky +
cylindrical +
unbranched +  and spicate +
subterminal +  and axillary +
membranaceous +
1.8 cm18 mm <br />0.018 m <br /> (6.7 cm67 mm <br />0.067 m <br />) +
obovate +, subcircular +  and elliptic +
1 cm10 mm <br />0.01 m <br /> (4 cm40 mm <br />0.04 m <br />) +
arranged +  and alternate +
marcescent +
deciduous +
long-silky +
0.2 cm2 mm <br />0.002 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
subentire +, crenate +  and revolute +
connate +  and distinct +
2-7[-10]-carpellate +
short-silky +
obnapiform +  and pyriform +
glandular-dotted +
flat;convex;flat;convex +
Flowering mid Jun-late Jul. +
Fl. Amer. Sept. +
overlapping +
distinct +
Illustrated +
branched +, sympodial +, monopodial +  and branching +
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 +
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 +
ferruginous +  and white +
Salix leiolepis +, Salix vestita subsp. leiolepis +  and Salix vestita var. psilophylla +
Salix vestita +
Salix sect. Chamaetia +
species +
rounded +
sympodial +, branching +  and heterophyllous +