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FNA Vol. 7 Page 25, 28, 49, 61, 80, 85, 86,
88
,
89
, 90, 91, 92, 107, 109, 151 |
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50.
Salix glauca
Linnaeus, Sp. Pl. 2: 1019. 1753.
Gray or gray-leaf willow
Plants
0.2-6 m, not clonal.
Stems
erect or decumbent; branches brownish, yellow-brown, gray-brown, or red-brown, villous or pilose to glabrescent; branchlets yellow-brown or red-brown, sparsely to densely villous or tomentose to glabrescent.
Leaves:
stipules (marcescent or not), foliaceous or rudimentary on early and late ones; petiole (usually deeply to shallowly grooved adaxially), 1-27 mm, (much longer than subtended bud); largest medial blade usually hypostomatous, sometimes hemiamphistomatous or amphistomatous, usually narrowly elliptic, elliptic, usually oblanceolate or obovate, sometimes narrowly oblong or obovate, 27-82 × 6-39 mm, 1.4-4.8 times as long as wide, base usually cuneate or convex, sometimes rounded, rarely subcordate, margins slightly revolute or flat, usually entire, apex acute, acuminate, convex, or rounded, abaxial surface densely villous or villous-silky, tomentose, short- or long-silky, or pilose, hairs usually wavy or straight, sometimes curved, adaxial usually slightly glossy, sometimes dull, moderately densely villous, pilose, or long-silky to glabrescent; proximal blade margins entire or serrulate; juvenile blade sparsely or densely villous, tomentose, or long-silky abaxially.
Catkins:
staminate 14-53 × 5-17 mm, flowering branchlet 1-25 mm; pistillate densely to sometimes loosely flowered, slender, stout, subglobose, or globose, 15-83 × 7-21 mm, flowering branchlet 2-37 mm; floral bract tawny, brown, bicolor, or greenish, 1-3.4 mm, apex convex or rounded, entire, abaxially hairy, hairs wavy, crinkled, or straight.
Staminate flowers:
abaxial nectary 0.1-1 mm, adaxial nectary narrowly oblong, oblong, square, ovate, or flask-shaped, 0.5-1.3 mm, nectaries distinct, or connate and cup-shaped; filaments distinct or slightly or partly connate, glabrous, or hairy on proximal 1/2; anthers 0.4-0.8 mm.
Pistillate flowers:
abaxial nectary absent, adaxial nectary usually narrowly oblong, oblong, or ovate, sometimes flask-shaped, 0.4-1.8 mm, shorter to longer than stipe; stipe 0.3-2.8 mm; ovary pyriform or obclavate, densely villous, tomentose, short-silky, or pubescent, beak usually gradually tapering to styles, sometimes gradually tapering to or slightly bulged below styles; ovules 6-22 per ovary; styles connate to distinct 1/2 their lengths or more, 0.3-1.6 mm; stigmas flat, abaxially non-papillate with rounded tip, or slenderly or broadly cylindrical, 0.2-0.8 mm.
Capsules
4.5-9 mm.
2
n
= 76, 95, 114, 152.
Varieties 5 (4 in the flora): North America, Eurasia (China [Altay Shan], Chukotka, Mongolia, Novaya Zemlya, Russian Far East, Sakhalin, Scandinavia, arctic, e, w Siberia).
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Updated: 2024-04-27 15:59:05 gmt
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