Difference between revisions of "Salix alaxensis var. longistylis"
J. Arnold Arbor. 1: 225. 1920.
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|name=Salix longistylis | |name=Salix longistylis | ||
|authority=Rydberg | |authority=Rydberg | ||
| + | |rank=species | ||
|publication_title=Bull. New York Bot. Gard. | |publication_title=Bull. New York Bot. Gard. | ||
|publication_place=2: 163. 1901 | |publication_place=2: 163. 1901 | ||
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|name=Salix alaxensis subsp. longistylis | |name=Salix alaxensis subsp. longistylis | ||
|authority=(Rydberg) Hultén | |authority=(Rydberg) Hultén | ||
| + | |rank=subspecies | ||
}} | }} | ||
|hierarchy=Salicaceae;Salix;Salix subg. Vetrix;Salix sect. Villosae;Salix alaxensis;Salix alaxensis var. longistylis | |hierarchy=Salicaceae;Salix;Salix subg. Vetrix;Salix sect. Villosae;Salix alaxensis;Salix alaxensis var. longistylis | ||
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|elevation=0-2000 m | |elevation=0-2000 m | ||
|distribution=B.C.;Man.;N.W.T.;Yukon;Alaska. | |distribution=B.C.;Man.;N.W.T.;Yukon;Alaska. | ||
| − | |discussion=<p>Variety longistylis differs from < | + | |discussion=<p>Variety longistylis differs from <i></i>var.<i> alaxensis</i> mainly in its glaucous and less densely hairy branchlets. Some specimens of <i></i>var.<i> alaxensis</i>, in which the indumentum has been partially removed by wind erosion, show that they, too, have glaucous branchlets. The only fundamental difference between the two may be density of branchlet indumentum. Other differences, which appear in varietal descriptions, may represent inadequate sampling. These taxa sometimes intergrade and <i></i>var.<i> longistylis</i> may not be worthy of taxonomic recognition. It is included here only because of very conspicuous differences between the extremes.</p><!-- |
--><p>Hybrids:</p><!-- | --><p>Hybrids:</p><!-- | ||
--><p>Variety longistylis forms natural hybrids with <i>Salix sitchensis</i>.</p><!-- | --><p>Variety longistylis forms natural hybrids with <i>Salix sitchensis</i>.</p><!-- | ||
| − | --><p>Variety longistylis × <i>Salix sitchensis</i> grows with both parents at the mouth of the Twentyfour Mile River, south-central Alaska. The plants resemble < | + | --><p>Variety longistylis × <i>Salix sitchensis</i> grows with both parents at the mouth of the Twentyfour Mile River, south-central Alaska. The plants resemble <i></i>var.<i> longistylis</i> in having relatively long styles and stigmas, oblong nectaries, and sparsely hairy branchlets, and <i>S. sitchensis</i> in having brittle branches, weakly glaucous branchlets, hairs sparse and crinkled, and ovaries with straight hairs. Fruits were set but no seed developed.</p> |
|tables= | |tables= | ||
|references= | |references= | ||
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-->{{#Taxon: | -->{{#Taxon: | ||
name=Salix alaxensis var. longistylis | name=Salix alaxensis var. longistylis | ||
| − | |||
|authority=(Rydberg) C. K. Schneider | |authority=(Rydberg) C. K. Schneider | ||
|rank=variety | |rank=variety | ||
| Line 58: | Line 59: | ||
|publication year=1920 | |publication year=1920 | ||
|special status= | |special status= | ||
| − | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/ | + | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f50eec43f223ca0e34566be0b046453a0960e173/coarse_grained_fna_xml/V7/V7_165.xml |
|genus=Salix | |genus=Salix | ||
|subgenus=Salix subg. Vetrix | |subgenus=Salix subg. Vetrix | ||
Revision as of 22:14, 16 December 2019
Shrubs or trees, 1–4 m. Stems: branches yellow-brown or red-brown, glabrous or sparsely villous; branchlets strongly glaucous, glabrescent or sparsely villous. Largest medial leaves: midrib prominent, sparsely pubescent to glabrescent, abaxial surface noticeably glaucous or not. Catkins: pistillate 37–103 × 8–20 mm, flowering branchlet 0–13 mm.
Phenology: Flowering late Mar-early Jul.
Habitat: Pioneer thickets on river alluvium and glacial moraines, subalpine thickets, alpine tundra, moist to mesic talus slopes, forest openings
Elevation: 0-2000 m
Distribution
B.C., Man., N.W.T., Yukon, Alaska.
Discussion
Variety longistylis differs from var. alaxensis mainly in its glaucous and less densely hairy branchlets. Some specimens of var. alaxensis, in which the indumentum has been partially removed by wind erosion, show that they, too, have glaucous branchlets. The only fundamental difference between the two may be density of branchlet indumentum. Other differences, which appear in varietal descriptions, may represent inadequate sampling. These taxa sometimes intergrade and var. longistylis may not be worthy of taxonomic recognition. It is included here only because of very conspicuous differences between the extremes.
Hybrids:
Variety longistylis forms natural hybrids with Salix sitchensis.
Variety longistylis × Salix sitchensis grows with both parents at the mouth of the Twentyfour Mile River, south-central Alaska. The plants resemble var. longistylis in having relatively long styles and stigmas, oblong nectaries, and sparsely hairy branchlets, and S. sitchensis in having brittle branches, weakly glaucous branchlets, hairs sparse and crinkled, and ovaries with straight hairs. Fruits were set but no seed developed.
Selected References
None.