Show Lower Taxa
Difference between revisions of "Alnus incana"
Methodus, 424. 1794.
Basionym: Betula alnus var. (ß) Linnaeus
Treatment appears in FNA Volume 3.
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| − | --><span class="statement" id="st- | + | --><span class="statement" id="st-undefined" data-properties=""><b>Trees </b>and shrubs, to 25 m; crowns open. <b>Bark</b> light to dark gray, reddish, or brown, smooth, or in age broken into irregular plates; lenticels present or absent, conspicuous, enlarged or unexpanded. <b>Winter</b> buds stipitate, ellipsoid, 4–7 mm, apex rounded to nearly acute; stalk 1–3 mm; scales 2–3, equal, valvate, resin-coated. <b>Leaf</b> blade narrowly ovate to elliptic, base cuneate to narrowly rounded, margins doubly serrate, with distinctly larger secondary teeth, apex acute or short-acuminate to obtuse. <b>Inflorescences</b> formed season before flowering and exposed during winter. <b>Flowering</b> before new growth in spring. <b>Infructescences</b> ovoid to nearly cylindric; peduncles relatively short and stout. <b>Samaras</b> elliptic to obovate, wings narrower than body, irregular in shape.</span><!-- |
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|publication year=1794 | |publication year=1794 | ||
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| − | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna- | + | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/9216fc802291cd3df363fd52122300479582ede7/coarse_grained_fna_xml/V3/V3_287.xml |
|subfamily=Betulaceae subfam. Betuloideae | |subfamily=Betulaceae subfam. Betuloideae | ||
|genus=Alnus | |genus=Alnus | ||
|species=Alnus incana | |species=Alnus incana | ||
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Revision as of 13:37, 27 July 2019
Trees and shrubs, to 25 m; crowns open. Bark light to dark gray, reddish, or brown, smooth, or in age broken into irregular plates; lenticels present or absent, conspicuous, enlarged or unexpanded. Winter buds stipitate, ellipsoid, 4–7 mm, apex rounded to nearly acute; stalk 1–3 mm; scales 2–3, equal, valvate, resin-coated. Leaf blade narrowly ovate to elliptic, base cuneate to narrowly rounded, margins doubly serrate, with distinctly larger secondary teeth, apex acute or short-acuminate to obtuse. Inflorescences formed season before flowering and exposed during winter. Flowering before new growth in spring. Infructescences ovoid to nearly cylindric; peduncles relatively short and stout. Samaras elliptic to obovate, wings narrower than body, irregular in shape.
Distribution
United States, Canada
Discussion
Subspecies 4 (2 in the flora).
Native Americans used Alnus incana medicinally to treat anemia, as an emetic, a compress or wash for sore eyes, and a diaphoretic, for internal bleeding, urinary problems, sprains, bruises or backaches, itches, flux, and piles, to cure saddle gall in horses, and when mixed with powdered bumblebees, as an aid for difficult labor (D. E. Moerman 1986).
Selected References
None.
Key
| 1 | Leaf blade thick, major teeth sharp; large shrubs of ne United States and e Canada. | Alnus incana subsp. rugosa |
| 1 | Leaf blade thin and papery, secondary teeth rounded or blunt; large shrubs or small trees of w United States, Canada. | Alnus incana subsp. tenuifolia |