Difference between revisions of "Alnus incana subsp. rugosa"

(Du Roi) R. T. Clausen

Cornell Univ. Agric. Exp. Sta. Mem. 291: 8. 1949.

Common names: Speckled alder tag alder swamp alder aulne blanchâtre
EndemicWeedy
Basionym: Betula alnus var. rugosa Du Roi
Synonyms: Alnus glauca Michaux Alnus incana var. americana Regel Alnus rugosa var. americana (Regel) Fernald Alnus rugosa var. rugosa (Fernald) Fernald Alnus rugosa var. tomophylla unknown
Treatment appears in FNA Volume 3.
FNA>Volume Importer
FNA>Volume Importer
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|name=Alnus glauca
 
|name=Alnus glauca
 
|authority=Michaux
 
|authority=Michaux
}}{{Treatment/ID/Synonym
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}} {{Treatment/ID/Synonym
 
|name=Alnus incana var. americana
 
|name=Alnus incana var. americana
 
|authority=Regel
 
|authority=Regel
}}{{Treatment/ID/Synonym
+
}} {{Treatment/ID/Synonym
 
|name=Alnus rugosa var. americana
 
|name=Alnus rugosa var. americana
 
|authority=(Regel) Fernald
 
|authority=(Regel) Fernald
}}{{Treatment/ID/Synonym
+
}} {{Treatment/ID/Synonym
 
|name=Alnus rugosa var. rugosa
 
|name=Alnus rugosa var. rugosa
 
|authority=(Fernald) Fernald
 
|authority=(Fernald) Fernald
}}{{Treatment/ID/Synonym
+
}} {{Treatment/ID/Synonym
 
|name=Alnus rugosa var. tomophylla
 
|name=Alnus rugosa var. tomophylla
 
|authority=unknown
 
|authority=unknown
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|elevation=0–800 m
 
|elevation=0–800 m
 
|distribution=St. Pierre and Miquelon;Man.;N.B.;Nfld.;N.S.;Ont.;P.E.I.;Que.;Sask.;Conn.;Ill.;Ind.;Iowa;Maine;Md.;Mass.;Mich.;Minn.;N.H.;N.J.;N.Y.;N.Dak.;Ohio;Pa.;R.I.;Vt.;Va.;W.Va.;Wis.
 
|distribution=St. Pierre and Miquelon;Man.;N.B.;Nfld.;N.S.;Ont.;P.E.I.;Que.;Sask.;Conn.;Ill.;Ind.;Iowa;Maine;Md.;Mass.;Mich.;Minn.;N.H.;N.J.;N.Y.;N.Dak.;Ohio;Pa.;R.I.;Vt.;Va.;W.Va.;Wis.
|discussion=<p>Alnus incana subsp. rugosa is an important shoreline and meadow colonizer in boreal and north temperate areas of the Canadian Shield, and a weedy successional species in damp areas along roadsides throughout its range. It overlaps in range and intergrades with A. incana subsp. tenuifolia to the west (in Saskatchewan and Manitoba) and with A. serrulata to the south. It is only slightly differentiated from the more treelike European A. incana subsp. incana.</p>
+
|discussion=<p><i>Alnus incana </i>subsp.<i> rugosa</i> is an important shoreline and meadow colonizer in boreal and north temperate areas of the Canadian Shield, and a weedy successional species in damp areas along roadsides throughout its range. It overlaps in range and intergrades with <i>A. incana </i>subsp.<i> tenuifolia</i> to the west (in Saskatchewan and Manitoba) and with <i>A. serrulata</i> to the south. It is only slightly differentiated from the more treelike European <i>A. incana</i> subsp. incana.</p>
 
|tables=
 
|tables=
 
|references=
 
|references=
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|publication year=1949
 
|publication year=1949
 
|special status=Endemic;Weedy
 
|special status=Endemic;Weedy
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/9216fc802291cd3df363fd52122300479582ede7/coarse_grained_fna_xml/V3/V3_149.xml
+
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/8f726806613d60c220dc4493de13607dd3150896/coarse_grained_fna_xml/V3/V3_149.xml
 
|subfamily=Betulaceae subfam. Betuloideae
 
|subfamily=Betulaceae subfam. Betuloideae
 
|genus=Alnus
 
|genus=Alnus

Revision as of 17:15, 18 September 2019

Shrubs, open, spreading, to 9 m. Bark dark grayish to reddish brown, smooth; lenticels whitish, prominent, horizontal. Winter buds parallel to twig, ellipsoid, 3–7 mm, apex acute or obtuse; stalks 2–4 mm. Leaf blade ovate to elliptic, 4–11 × 3–8 cm, firm, base cuneate to narrowly rounded, margins usually coarsely doubly serrate, toothed to base, apex acute or short-acuminate to slightly obtuse; surfaces abaxially often glaucous, glabrous to sparsely pubescent, often more densely so on veins, slightly to not noticeably resin-coated. Inflorescences: staminate catkins in 1 or more clusters of 2–4, 2–7 cm; pistillate catkins in 1 or more clusters of 2–6. Infructescences ovoid, 1–1.7 × 0.8–1.2 cm; peduncles 1–5 mm. 2n = 28.


Phenology: Flowering early spring.
Habitat: Stream banks, lake shores, bogs, swamps, margins of wet fields, swales, and roadsides, often forming dense thickets
Elevation: 0–800 m

Distribution

V3 149-distribution-map.gif

St. Pierre and Miquelon, Man., N.B., Nfld., N.S., Ont., P.E.I., Que., Sask., Conn., Ill., Ind., Iowa, Maine, Md., Mass., Mich., Minn., N.H., N.J., N.Y., N.Dak., Ohio, Pa., R.I., Vt., Va., W.Va., Wis.

Discussion

Alnus incana subsp. rugosa is an important shoreline and meadow colonizer in boreal and north temperate areas of the Canadian Shield, and a weedy successional species in damp areas along roadsides throughout its range. It overlaps in range and intergrades with A. incana subsp. tenuifolia to the west (in Saskatchewan and Manitoba) and with A. serrulata to the south. It is only slightly differentiated from the more treelike European A. incana subsp. incana.

Selected References

None.

Lower Taxa

None.
John J. Furlow +
(Du Roi) R. T. Clausen +
Betula alnus var. rugosa +
Speckled alder +, tag alder +, swamp alder +  and aulne blanchâtre +
St. Pierre and Miquelon +, Man. +, N.B. +, Nfld. +, N.S. +, Ont. +, P.E.I. +, Que. +, Sask. +, Conn. +, Ill. +, Ind. +, Iowa +, Maine +, Md. +, Mass. +, Mich. +, Minn. +, N.H. +, N.J. +, N.Y. +, N.Dak. +, Ohio +, Pa. +, R.I. +, Vt. +, Va. +, W.Va. +  and Wis. +
0–800 m +
Stream banks, lake shores, bogs, swamps, margins of wet fields, swales, and roadsides, often forming dense thickets +
Flowering early spring. +
Cornell Univ. Agric. Exp. Sta. Mem. +
Endemic +  and Weedy +
Alnus glauca +, Alnus incana var. americana +, Alnus rugosa var. americana +, Alnus rugosa var. rugosa +  and Alnus rugosa var. tomophylla +
Alnus incana subsp. rugosa +
Alnus incana +
subspecies +