Difference between revisions of "Salix nivalis"
Fl. Bor.-Amer. 2: 152. 1838.
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|common_names=Dwarf snow willow | |common_names=Dwarf snow willow | ||
+ | |special_status={{Treatment/ID/Special_status | ||
+ | |code=F | ||
+ | |label=Illustrated | ||
+ | }}{{Treatment/ID/Special_status | ||
+ | |code=E | ||
+ | |label=Endemic | ||
+ | }} | ||
|basionyms= | |basionyms= | ||
|synonyms={{Treatment/ID/Synonym | |synonyms={{Treatment/ID/Synonym | ||
|name=Salix nivalis var. saximontana | |name=Salix nivalis var. saximontana | ||
|authority=(Rydberg) C. K. Schneider | |authority=(Rydberg) C. K. Schneider | ||
− | }}{{Treatment/ID/Synonym | + | |rank=variety |
+ | }} {{Treatment/ID/Synonym | ||
|name=Salix reticulata subsp. nivalis | |name=Salix reticulata subsp. nivalis | ||
|authority=(Hooker) Á. Löve, D. Löve & B. M. Kapoor | |authority=(Hooker) Á. Löve, D. Löve & B. M. Kapoor | ||
− | }}{{Treatment/ID/Synonym | + | |rank=subspecies |
+ | }} {{Treatment/ID/Synonym | ||
|name=Salix reticulata var. saximontana | |name=Salix reticulata var. saximontana | ||
|authority=(Rydberg) Kelso | |authority=(Rydberg) Kelso | ||
+ | |rank=variety | ||
}} | }} | ||
|hierarchy=Salicaceae;Salix;Salix subg. Chamaetia;Salix sect. Chamaetia;Salix nivalis | |hierarchy=Salicaceae;Salix;Salix subg. Chamaetia;Salix sect. Chamaetia;Salix nivalis | ||
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|elevation=1900-4000 m | |elevation=1900-4000 m | ||
|distribution=Alta.;B.C.;Calif.;Colo.;Idaho;Mont.;Nev.;N.Mex.;Oreg.;Utah;Wash.;Wyo. | |distribution=Alta.;B.C.;Calif.;Colo.;Idaho;Mont.;Nev.;N.Mex.;Oreg.;Utah;Wash.;Wyo. | ||
− | |discussion=<p>Because geographic overlap is small and evidence of intergradation is tenuous, Salix nivalis is best treated as a species separate from S. reticulata; S. nivalis was previously treated as a subspecies of S. reticulata (G. W. Argus 1986b, 1991).</p> | + | |discussion=<p>Because geographic overlap is small and evidence of intergradation is tenuous, <i>Salix nivalis</i> is best treated as a species separate from <i>S. reticulata</i>; <i>S. nivalis</i> was previously treated as a subspecies of <i>S. reticulata</i> (G. W. Argus 1986b, 1991).</p> |
|tables= | |tables= | ||
|references= | |references= | ||
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-->{{#Taxon: | -->{{#Taxon: | ||
name=Salix nivalis | name=Salix nivalis | ||
− | |||
|authority=Hooker | |authority=Hooker | ||
|rank=species | |rank=species | ||
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|publication title=Fl. Bor.-Amer. | |publication title=Fl. Bor.-Amer. | ||
|publication year=1838 | |publication year=1838 | ||
− | |special status= | + | |special status=Illustrated;Endemic |
− | |source xml=https:// | + | |source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V7/V7_58.xml |
|genus=Salix | |genus=Salix | ||
|subgenus=Salix subg. Chamaetia | |subgenus=Salix subg. Chamaetia |
Latest revision as of 23:34, 5 November 2020
Plants 0.01–0.04 m, (dwarf, forming clonal mats by rhizomes). Stems trailing or erect; branches yellow-brown or red-brown, glabrous or pubescent; branchlets yellow-brown or red-brown, glabrous or pilose. Leaves: stipules absent or rudimentary; petiole 1.5–7 mm (sometimes glandular distally or throughout); largest medial blade hypostomatous, (veins impressed-reticulate, 2 pairs of secondary veins arising at or close to base, arcing toward apex,), elliptic to broadly elliptic, 6–22 × 4–15 mm, 1.1–2.8 times as long as wide, base convex, rounded, subcordate, or cuneate, margins slightly revolute, entire (glandular-dotted), apex convex, rounded, or retuse, abaxial surface glabrous or with long-silky hairs, adaxial slightly glossy, glabrous; proximal blade margins entire; juvenile blade glabrous. Catkins: staminate 7–19 × 2.5–6 mm, flowering branchlet 0.5–17 mm; pistillate densely to loosely flowered (4–17 flowers), stout, subglobose or globose, 7–21 × 2–9 mm, flowering branchlet 1–10 mm; floral bract tawny or light rose, 0.8–1.8 mm, apex rounded, entire, abaxially glabrous. Staminate flowers: abaxial nectary 0.5–1.3 mm, adaxial nectary narrowly oblong, oblong, or square, 0.5–1.2 mm, nectaries connate and cup-shaped; filaments distinct, glabrous or hairy basally; anthers ellipsoid or shortly cylindrical, 0.4–0.6 mm. Pistillate flowers: abaxial nectary (0–)0.2–0.5 mm, adaxial nectary oblong, 0.2–1 mm, longer than stipe, nectaries distinct or connate and shallowly cup-shaped; stipe 0–0.8 mm; ovary obturbinate, short-silky, hairs flattened, beak abruptly tapering to styles; ovules 8–10 per ovary; styles distinct to connate 1/2 their lengths, 0.2–0.4 mm; stigmas flat, abaxially non-papillate with rounded tip, 0.2–0.26–0.36 mm. Capsules 3–4 mm. 2n = 38.
Phenology: Flowering late Jun-late Aug.
Habitat: Alpine tundra, cirques, lake basins, rocky slopes and ridges, fellfields
Elevation: 1900-4000 m
Distribution
![V7 58-distribution-map.gif](/w/images/3/3d/V7_58-distribution-map.gif)
Alta., B.C., Calif., Colo., Idaho, Mont., Nev., N.Mex., Oreg., Utah, Wash., Wyo.
Discussion
Because geographic overlap is small and evidence of intergradation is tenuous, Salix nivalis is best treated as a species separate from S. reticulata; S. nivalis was previously treated as a subspecies of S. reticulata (G. W. Argus 1986b, 1991).
Selected References
None.