View source for Alnus incana subsp. rugosa

{{Treatment/ID
|accepted_name=Alnus incana subsp. rugosa
|accepted_authority=(Du Roi) R. T. Clausen
|publications={{Treatment/Publication
|title=Cornell Univ. Agric. Exp. Sta. Mem.
|place=291: 8. 1949
|year=1949
}}
|common_names=Speckled alder;tag alder;swamp alder;aulne blanchâtre
|special_status={{Treatment/ID/Special_status
|code=E
|label=Endemic
}}{{Treatment/ID/Special_status
|code=W
|label=Weedy
}}
|basionyms={{Treatment/ID/Synonym
|name=Betula alnus var. rugosa
|authority=Du Roi
}}
|synonyms={{Treatment/ID/Synonym
|name=Alnus glauca
|authority=Michaux
}}{{Treatment/ID/Synonym
|name=Alnus incana var. americana
|authority=Regel
}}{{Treatment/ID/Synonym
|name=Alnus rugosa var. americana
|authority=(Regel) Fernald
}}{{Treatment/ID/Synonym
|name=Alnus rugosa var. rugosa
|authority=(Fernald) Fernald
}}{{Treatment/ID/Synonym
|name=Alnus rugosa var. tomophylla
|authority=unknown
}}
|hierarchy=Betulaceae;Betulaceae subfam. Betuloideae;Alnus;Alnus incana;Alnus incana subsp. rugosa
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Betulaceae]]</div><div class="higher-taxon"><small>subfamily</small>[[Betulaceae subfam. Betuloideae]]</div><div class="higher-taxon"><small>genus</small>[[Alnus]]</div><div class="higher-taxon"><small>species</small>[[Alnus incana]]</div><div class="higher-taxon"><small>subspecies</small>[[Alnus incana subsp. rugosa]]</div></div>
|volume=Volume 3
|mention_page=
|treatment_page=
}}<!--

--><span class="statement" id="st-d0_s0" data-properties="shrub architecture;shrub orientation;shrub some measurement"><b>Shrubs,</b> open, spreading, to 9 m.</span> <span class="statement" id="st-d0_s1" data-properties="bark coloration;bark coloration;bark coloration;bark architecture or pubescence or relief"><b>Bark </b>dark grayish to reddish-brown, smooth;</span> <span class="statement" id="st-d0_s2" data-properties="lenticel coloration;lenticel prominence;lenticel orientation">lenticels whitish, prominent, horizontal.</span> <span class="statement" id="st-d0_s3" data-properties="bud season;bud arrangement;bud shape;bud some measurement;apex shape;apex shape"><b>Winter </b>buds parallel to twig, ellipsoid, 3–7 mm, apex acute or obtuse;</span> <span class="statement" id="st-d0_s4" data-properties="stalk some measurement">stalks 2–4 mm.</span> <span class="statement" id="st-d0_s5" data-properties="leaf-blade shape;leaf-blade shape;leaf-blade shape;leaf-blade length;leaf-blade width;leaf-blade texture;base shape;base shape;base shape;margin architecture or shape;margin shape;apex shape;apex shape;apex shape;apex shape"><b>Leaf-</b>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;</span> <span class="statement" id="st-d0_s6" data-properties="surface pubescence;surface pubescence;surface pubescence;surface pubescence;surface coating">surfaces abaxially often glaucous, glabrous to sparsely pubescent, often more densely so on veins, slightly to not noticeably resin-coated.</span> <span class="statement" id="st-d0_s7" data-properties="catkin architecture;catkin some measurement"><b>Inflorescences:</b> staminate catkins in 1 or more clusters of 2–4, 2–7 cm;</span> <span class="statement" id="st-d0_s8" data-properties="catkin architecture">pistillate catkins in 1 or more clusters of 2–6.</span> <span class="statement" id="st-d0_s9" data-properties="infructescence shape;infructescence length;infructescence width"><b>Infructescences </b>ovoid, 1–1.7 × 0.8–1.2 cm;</span> <span class="statement" id="st-d0_s10" data-properties="peduncle some measurement;2n chromosome quantity">peduncles 1–5 mm. <b>2n</b> = 28.</span><!--

-->{{Treatment/Body
|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=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>
|tables=
|references=
}}<!--

--><!--

-->{{#Taxon:
name=Alnus incana subsp. rugosa
|author=
|authority=(Du Roi) R. T. Clausen
|rank=subspecies
|parent rank=species
|synonyms=Alnus glauca;Alnus incana var. americana;Alnus rugosa var. americana;Alnus rugosa var. rugosa;Alnus rugosa var. tomophylla
|basionyms=Betula alnus var. rugosa
|family=Betulaceae
|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=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.
|reference=None
|publication title=Cornell Univ. Agric. Exp. Sta. Mem.
|publication year=1949
|special status=Endemic;Weedy
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/287ef3db526bd807d435a3c7423ef2df1e951227/V3/V3_149.xml
|subfamily=Betulaceae subfam. Betuloideae
|genus=Alnus
|species=Alnus incana
|subspecies=Alnus incana subsp. rugosa
|2n chromosome quantity=28
|apex shape=short-acuminate;slightly obtuse
|bark architecture or pubescence or relief=smooth
|bark coloration=dark grayish;reddish-brown
|base shape=cuneate;narrowly rounded
|bud arrangement=parallel
|bud season=winter
|bud shape=ellipsoid
|bud some measurement=3mm;7mm
|catkin architecture=pistillate;staminate
|catkin some measurement=2cm;7cm
|infructescence length=1cm;1.7cm
|infructescence shape=ovoid
|infructescence width=0.8cm;1.2cm
|leaf-blade length=4cm;11cm
|leaf-blade shape=ovate;elliptic
|leaf-blade texture=firm
|leaf-blade width=3cm;8cm
|lenticel coloration=whitish
|lenticel orientation=horizontal
|lenticel prominence=prominent
|margin architecture or shape=serrate
|margin shape=toothed
|peduncle some measurement=1mm;5mm
|shrub architecture=open
|shrub orientation=spreading
|shrub some measurement=0m;9m
|stalk some measurement=2mm;4mm
|surface coating=resin-coated
|surface pubescence=glabrous;sparsely pubescent
}}<!--

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