Salix turnorii

Raup

J. Arnold Arbor. 17: 234, plate 193. 1936.

Common names: Turnor’s willow
Synonyms: Salix lutea var. turnorii (Raup) B. Boivin
Treatment appears in FNA Volume 7. Treatment on page 122. Mentioned on page 88, 103, 120.

Shrubs, 1–2.5 m, (forming clones by layering). Stems: branches yellowbrown or yellow-gray, not or weakly glaucous, (with sparkling wax crystals, dull or slightly glossy), pilose or villous; branchlets gray-brown or redbrown, pubescent, villous, or velvety. Leaves: stipules foliaceous, apex acute or convex; petiole shallowly grooved adaxially, 4–13 mm, villous or pubescent adaxially; largest medial blade (amphistomatous), narrowly oblong, narrowly elliptic, elliptic, oblanceolate, or lanceolate, 26–47 × 7.5–15 mm, 2.8–4.1 times as long as wide, base convex, rounded, or subcordate, margins slightly revolute or flat, serrate or serrulate, apex acuminate to acute, abaxial surface glaucous, glabrous, pilose, villous, or long-silky, hairs straight or wavy, adaxial dull, sparsely or moderately densely pilose or long-silky, especially on midrib; proximal blade margins entire or serrulate; juvenile blade reddish or yellowish green, sparsely to moderately densely long-silky or pubescent abaxially, hairs white. Catkins flowering just before or as leaves emerge; staminate stout, 16–30 × 8–10 mm, flowering branchlet 1.5–4 mm; pistillate loosely flowered, stout, 18–22 × 9–11 mm, flowering branchlet 3–4 mm; floral bract brown or tawny, 1.2–1.6 mm, apex acute or rounded, abaxially hairy throughout or proximally, hairs straight or wavy. Staminate flowers: adaxial nectary narrowly oblong or ovate, 0.7–1.1 mm; filaments distinct or connate, hairy basally; anthers yellow, 0.6–0.8 mm. Pistillate flowers: adaxial nectary oblong, flask-shaped, or narrowly ovate, 0.4–1 mm, shorter than stipe; stipe 2–4 mm; ovary pyriform, glabrous, beaks slightly bulged below styles; ovules 14–18 per ovary; styles 0.3–0.5 mm; stigmas flat, abaxially non-papillate with rounded or pointed tip, 0.16–0.23–0.28 mm. Capsules 2.5–5 mm.


Phenology: No flowering time data are available (probably May or Jun).
Habitat: Active sand dunes
Elevation: 200-300 m

Discussion

Of conservation concern.

Salix turnorii is known from the Lake Athabasca sand dunes in northwestern Saskatchewan. Salix famelica in the Great Sand Hills, southern Saskatchewan, is very similar morphologically and may have been the source of populations ancestral to S. turnorii that moved into northern Saskatchewan during the warm Holocene Hypsithermal Period (ca. 9000–6000 yrs. B.P.).

Hybrids:

Salix turnorii forms natural hybrids with S. brachycarpa var. psammophila.

Selected References

None.

Lower Taxa

None.

"-0.28mm" is not declared as a valid unit of measurement for this property.

... more about "Salix turnorii"
21 +, 4 +, 1 +, 16 +  and 29 +
114 +, 95 +, 76 +, 57 +  and 38 +
long-silky +, villous +, pilose +, glabrous +  and glaucous +
ovate +, flask--shaped +  and oblong +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
long-silky;pilose +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.08 cm0.8 mm <br />8.0e-4 m <br />) +
Rounded (?) +, Acute (?) +  and Acuminate (?) +
George W. Argus +
subcordate +, rounded +  and convex +
Salix sect. Vetrix +
tapering +
yellowish green +  and reddish +
ferruginous +  and white +
serrulate +  and entire +
pubescent +  and long-silky +
toothed +  and 2-fid +
persistent +
yellow-gray +  and yellowbrown +
villous +, pilose +, punct +  and glaucous +
flowered +  and pistillate +
velvety +, villous +  and pubescent +
slender +  and stout +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
intermediate +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
pendulous +, spreading +  and erect +
Turnor’s willow +
200-300 m +
connate +  and distinct +
tawny +  and brown +
0.12 cm1.2 mm <br />0.0012 m <br /> (0.16 cm1.6 mm <br />0.0016 m <br />) +
pistillate +  and staminate +
bisexual +  and unisexual +
Active sand dunes +
straight +
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 +
26mm;47mm +
lanceolate +, oblanceolate +, elliptic +  and oblong +
0.75 cm7.5 mm <br />0.0075 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
serrulate +  and serrate +
flat +  and revolute +
2-7[-10]-carpellate +
pyriform +
glandular-dotted +
pubescent +  and villous +
usually convex;flat +
0.4 cm4 mm <br />0.004 m <br /> (1.3 cm13 mm <br />0.013 m <br />) +
No flowering time data are available (probably May or Jun). +
J. Arnold Arbor. +
overlapping +
distinct +
decumbent;erect +
non-papillate +
cylindrical +
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
caducous +  and persistent +
distinct +  and connate +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
persistent +  and deciduous +
Salix lutea var. turnorii +
Salix turnorii +
Salix sect. Cordatae +
species +
pointed +  and rounded +
sympodial +, branching +  and heterophyllous +