Salix orestera

C. K. Schneider

J. Arnold Arbor. 1: 164. 1920.

Common names: Gray-leaf Sierra willow
Endemic
Synonyms: Salix commutata var. rubicunda Jepson Salix glauca subsp. orestera (C. K. Schneider) Youngberg Salix glauca var. orestera (C. K. Schneider) Jepson
Treatment appears in FNA Volume 7. Treatment on page 108. Mentioned on page 92, 100, 107, 109, 151.

Plants 0.5–2 m. Stems: branches dark redbrown or yellowbrown, not to strongly glaucous, glabrous; branchlets yellowbrown or redbrown, (not or weakly glaucous), pilose or pubescent, hairs straight, wavy, or geniculate, (inner membranaceous bud-scale layer free, separating from outer layer). Leaves: stipules foliaceous, rudimentary, or absent on early ones, foliaceous on late ones, apex acute; petiole convex to flat, or shallowly grooved adaxially, 4–9 mm, pilose adaxially; largest medial blade (sometimes amphistomatous), lorate, narrowly oblong, narrowly elliptic, or oblanceolate, 35–95 × 7.5–20 mm, 3.4–7.1 times as long as wide, base cuneate or convex, margins flat or slightly revolute, entire, apex acute, acuminate, or convex, abaxial surface glaucous (sometimes obscured by hairs), sparsely to moderately densely long to short-silky or pubescent, hairs (white, sometimes also ferruginous), straight or wavy, adaxial dull or slightly glossy, sparsely or moderately densely pubescent or long to short-silky, (hairs white, sometimes also ferruginous); proximal blade margins entire or serrulate; juvenile blade densely long-silky abaxially, hairs white, sometimes also ferruginous. Catkins flowering as leaves emerge; staminate stout, 15.5–34 × 7–14 mm, flowering branchlet 1–8 mm; pistillate moderately densely flowered, stout, 20–55 (–65 in fruit) × 11–13 mm, flowering branchlet 2–15 mm; floral bract dark-brown or bicolor, 1.2–2.5 mm, apex acute or rounded, abaxially hairy, hairs straight or wavy. Staminate flowers: adaxial nectary oblong or ovate, 0.6–1.1 mm; filaments distinct or connate less than 1/2 their lengths, hairy basally; anthers purple turning yellow, 0.6–1 mm. Pistillate flowers: adaxial nectary oblong or flask-shaped, 0.7–1.3 mm, shorter than or equal to stipe; stipe 0.8–2 mm; ovary obclavate or pyriform, short-silky-villous, beak gradually tapering to or slightly bulged below styles; ovules 15–16 per ovary; styles 0.6–1 mm; stigmas flat, abaxially non-papillate with rounded or pointed tip, or broadly cylindrical, 0.24–0.32–0.44 mm. Capsules 5–10 mm.


Phenology: Flowering late May-late Aug.
Habitat: Subalpine meadows, slopes, lakes, streams, granite substrates
Elevation: 2100-4000 m

Discussion

Salix orestera is so similar to S. glauca var. villosa that it is sometimes included in S. glauca. It is phenetically most similar to S. eastwoodiae and S. lemmonii (G. W. Argus 1997), and the possibility that it is a hybrid or an alloploid involving those species needs study.

Salix orestera can be distinguished from S. glauca var. villosa in having largest medial blades usually narrower, 3.4–7.1 times as long as wide, abaxial surfaces distinctly silky with appressed hairs pointing toward apex, hairs sometimes ferruginous, secondary veins raised abaxially and adaxially, branches often strongly glaucous, and staminate flowers without abaxial nectaries; S. glauca var. villosa has largest medial blades usually broader, 2.2–3.9 times as long as wide, abaxial surfaces usually glabrescent or, if hairy, hairs unkempt, slightly spreading, hairs always white, secondary veins raised abaxially, flat or impressed adaxially, branches not glaucous, staminate flowers often with abaxial nectaries.

Selected References

None.

Lower Taxa

None.

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

... more about "Salix orestera"
21 +, 4 +, 1 +, 16 +  and 29 +
114 +, 95 +, 76 +, 57 +  and 38 +
pubescent +, short-silky +  and glaucous +
flask--shaped +, oblong +  and ovate +
0.07 cm0.7 mm <br />7.0e-4 m <br /> (0.13 cm1.3 mm <br />0.0013 m <br />) +
short-silky;pubescent +
glossy +  and dull +
purple turning yellow +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
Rounded (?) +, Acute (?) +, Convex (?) +  and Acuminate (?) +
intermediate +
George W. Argus +
C. K. Schneider +
convex +  and cuneate +
Salix tribe Hastatae +
tapering +
ferruginous +  and white +
serrulate +  and entire +
toothed +  and 2-fid +
persistent +
yellowbrown +  and dark redbrown +
glabrous +  and glaucous +
flowered +  and pistillate +
pubescent +  and pilose +
slender +  and stout +
0.2 cm2 mm <br />0.002 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
intermediate +
0.5 cm5 mm <br />0.005 m <br /> (1 cm10 mm <br />0.01 m <br />) +
pendulous +, spreading +  and erect +
Gray-leaf Sierra willow +
Calif. +, Nev. +  and Oreg. +
2100-4000 m +
connate +  and distinct +
bicolor +  and dark-brown +
0.12 cm1.2 mm <br />0.0012 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
pistillate +  and staminate +
bisexual +  and unisexual +
Subalpine meadows, slopes, lakes, streams, granite substrates +
ferruginous +  and white +
straight +
wavy +  and geniculate +
unbranched +  and spicate +
subterminal +  and axillary +
membranaceous +
hemiamphistomatous +, amphistomatous +  and hypostomatous +
oblong +  and narrowly broadly elliptic oblanceolate obovate or broadly obovate +
arranged +  and alternate +
marcescent +
deciduous +
35mm;95mm +
oblanceolate +, elliptic +, oblong +  and lorate +
0.75 cm7.5 mm <br />0.0075 m <br /> (2 cm20 mm <br />0.02 m <br />) +
revolute +  and flat +
2-7[-10]-carpellate +
short-silky-villous +
pyriform +  and obclavate +
glandular-dotted +
convex;flat +
0.4 cm4 mm <br />0.004 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
Flowering late May-late Aug. +
J. Arnold Arbor. +
overlapping +
distinct +
decumbent;erect +
non-papillate +
cylindrical +
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
caducous +  and persistent +
distinct +  and connate +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
persistent +  and deciduous +
Salix commutata var. rubicunda +, Salix glauca subsp. orestera +  and Salix glauca var. orestera +
Salix orestera +
Salix sect. Hastatae +
species +
pointed +  and rounded +
sympodial +, branching +  and heterophyllous +