Salix reticulata |
Salix pulchra |
|
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net-leaf willow, net-vein willow, netted willow |
diamond-leaf willow, tealeaf willow |
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Habit | Plants 0.03–0.15 m, (dwarf, forming clones by layering). | Shrubs, 0.1–3(–4.5) m. Stems: branches yellow-brown or red-brown, not or weakly glaucous, (slightly or highly glossy), villous in patches to glabrescent; branchlets yellow-green or brownish, glabrous, puberulent, or densely villous, (buds caprea- or arctica-type). |
Stems | trailing; branches and branchlets yellow-brown or red-brown, glabrous. |
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Leaves | stipules absent or rudimentary; petiole 3–46 mm, (sometimes glandular distally); largest medial blade amphistomatous or hemiamphistomatous, (2 pairs of secondary veins arising at or close to base, arcing toward apex), oblong, broadly oblong, broadly elliptic, subcircular, or circular, (8–)12–66 × 8–50 mm, 1–1.5 times as long as wide, base convex, rounded, subcordate, or cordate, margins slightly revolute, entire or crenulate (glandular-dotted), apex rounded, convex, or retuse, abaxial surface sparsely long-silky to glabrescent, adaxial (venation deeply impressed), slightly or highly glossy, glabrous or pilose; proximal blade margins entire; juvenile blade glabrous. |
stipules (usually marcescent), foliaceous, (linear or lanceolate, 2–9.8–23 mm), apex acuminate; petiole convex to flat adaxially, 2.8–10(–15) mm, glabrous or puberulent adaxially; largest medial blade narrowly elliptic, elliptic, or obovate, 22–75 × 8–26 mm, 1.7–4.7 times as long as wide, base cuneate, margins flat to slightly revolute, entire, crenate, or serrulate, apex acuminate, acute, or convex, abaxial surface glaucous, glabrous or pubescent, midrib pilose, hairs (white, sometimes also ferruginous), straight, adaxial highly to slightly glossy, midrib glabrous or sparsely pubescent; proximal blade margins entire; juvenile blade green, glabrous or pubescent abaxially, hairs white, sometimes also ferruginous. |
Staminate flowers | abaxial nectary 0.5–0.9 mm, adaxial nectary oblong or ovate, 0.5–1 mm, nectaries connate and cup-shaped; filaments distinct, hairy on proximal 1/2 or throughout; anthers ellipsoid or globose, 0.3–0.4 mm. |
adaxial nectary narrowly oblong to oblong, 0.6–1 mm; filaments distinct or connate less than 1/2 their lengths, glabrous; anthers purple turning yellow, ellipsoid to shortly cylindrical, 0.4–0.8 mm. |
Pistillate flowers | abaxial nectary (0–)0.3–0.5 mm, adaxial nectary narrowly oblong, 0.5–1 mm, equal to or longer than stipe, nectaries distinct or connate and cup-shaped; stipe 0–0.8 mm; ovary pyriform or ovoid, short-silky, hairs flattened, beak abruptly tapering to styles; ovules 8–18 per ovary; styles connate to distinct 1/2 their lengths, 0.2–0.3 mm; stigmas flat, abaxially non-papillate with rounded tip, broadly cylindrical, or 2 plump lobes, 0.2–0.26–0.36 mm. |
adaxial nectary narrowly oblong to oblong, 0.4–1.6 mm, longer than stipe; stipe 0.2–0.8 mm; ovary pyriform, long-silky, beak slightly bulged below styles; ovules 12–16 per ovary; styles 1–1.8 mm; stigmas slenderly cylindrical, 0.44–0.63–0.96 mm. |
Capsules | 4.5–5 mm. |
3.2–5.6 mm. |
Catkins | staminate 11–54 × 4–9 mm, flowering branchlet 2–28 mm; pistillate densely flowered (more than 6 flowers), slender or stout, 11–79 × 3–8 mm, flowering branchlet 2–37 mm; floral bract tawny, 0.8–1.8 mm, apex rounded to retuse, entire, abaxially glabrous. |
flowering before leaves emerge; staminate stout or subglobose, 21–53 × 12–19 mm, flowering branchlet 0–3 mm; pistillate densely flowered, slender to stout, 27–82 × 8–20 mm, flowering branchlet 0–3(–8) mm; floral bract brown or black, 1.6–2.8 mm, apex acute or rounded, abaxially hairy distally, hairs straight. |
2n | = 38. |
= 76. |
Salix reticulata |
Salix pulchra |
|
Phenology | Flowering early Jun-mid Aug. | Flowering mid Apr-late Jul. |
Habitat | Arctic-alpine, polygonal tundra, dry tussock tundra, partially stabilized sand dunes, sedge meadows, Dryas tundra on alpine cliffs and ledges, snowbeds, stabilized talus slopes, white spruce woods, treed bogs | Arctic boreal and subalpine thickets, stream and lake margins, tundra, black spruce-lichen woodlands, open white spruce-dwarf birch woodlands |
Elevation | 0-3500 m (0-11500 ft) | 0-2000 m (0-6600 ft) |
Distribution |
AK; CO; AB; BC; MB; NL; NT; NU; ON; QC; SK; YT; Europe; Asia (Chukotka, Russian Far East, arctic, e Siberia, Spitzbergen)
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AK; BC; NT; NU; YT; Asia (Chukotka, Kamchatka, Lena-Kolyma, Okhotia, Russia [Anadyr], Siberia) |
Discussion | The reported occurrence of Salix reticulata in Colorado (R. D. Dorn 1997) needs further study. Salix reticulata occurs in Europe in northern Scotland, northern Scandinavia, the Alps and other European mountains, and arctic Eurasia. The species is circumpolar except for Greenland and Iceland. A population of Salix reticulata on the Queen Charlotte Islands, with consistently glabrous ovaries, was named subsp. glabellicarpa. Some southeastern Alaska populations have plants with glabrous, partially hairy, and completely short-silky ovaries growing together. The possibility that subsp. glabellicarpa may be a hybrid or a simple mutation needs study. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Plants with branchlets densely villous with white, gray, or, sometimes, ferruginous hairs have been named var. yukonensis. This hairy variant occurs scattered throughout populations in both North America and Russia and does not seem to warrant taxonomic recognition. The closely related Salix planifolia shows similar variation. Hybrids: Salix pulchra forms natural hybrids with S. planifolia and S. scouleriana. Salix pulchra × S. scouleriana is known from Alaska. It resembles S. pulchra in its long, linear stipules, general leaf shape, and relatively long styles; and S. scouleriana in its juvenile leaves with abundant ferruginous hairs, petioles densely villous to velvety, and relatively short stigmas. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 7, p. 65. | FNA vol. 7, p. 138. |
Parent taxa | Salicaceae > Salix > subg. Chamaetia > sect. Chamaetia | Salicaceae > Salix > subg. Vetrix > sect. Phylicifoliae |
Sibling taxa | ||
Synonyms | S. reticulata var. gigantifolia, S. reticulata subsp. glabellicarpa, S. reticulata var. semicalva | S. divaricata subsp. pulchra, S. phylicifolia subsp. pulchra, S. phylicifolia var. subglauca, S. planifolia subsp. pulchra, S. planifolia var. yukonensis, S. pulchra var. yukonensis |
Name authority | Linnaeus: Sp. Pl. 2: 1018. (1753) | Chamisso: Linnaea 6: 543. (1831) |
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