View source for Salix rotundifolia

{{Treatment/ID
|accepted_name=Salix rotundifolia
|accepted_authority=Trautvetter
|publications={{Treatment/Publication
|title=Nouv. Mém. Soc. Imp. Naturalistes Moscou
|place=2: 304, plate 11. 1832
|year=1832
}}
|basionyms=
|synonyms=
|hierarchy=Salicaceae;Salix;Salix subg. Chamaetia;Salix sect. Herbella;Salix rotundifolia
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Salicaceae]]</div><div class="higher-taxon"><small>genus</small>[[Salix]]</div><div class="higher-taxon"><small>subgenus</small>[[Salix subg. Chamaetia]]</div><div class="higher-taxon"><small>section</small>[[Salix sect. Herbella]]</div><div class="higher-taxon"><small>species</small>[[Salix rotundifolia]]</div></div>
|volume=Volume 7
|mention_page=page 27, 62, 70, 74, 80, 81
|treatment_page=page 69
}}<!--

--><span class="statement" id="st-d0_s0" data-properties="whole_organism some measurement;whole_organism growth form"><b>Plants </b>0.005–0.05 m, (dwarf), forming clones by rhizomes.</span> <span class="statement" id="st-d0_s1" data-properties="stem orientation"><b>Stems </b>erect;</span> <span class="statement" id="st-d0_s2" data-properties="branch coloration;branch coloration;branch coloration;branch coloration;branch coloration;branch pubescence">branches yellow-green, yellowbrown, or gray-brown, glabrous;</span> <span class="statement" id="st-d0_s3" data-properties="branchlet coloration;branchlet coloration;branchlet pubescence">branchlets yellowbrown or redbrown, glabrous;</span> <span class="statement" id="st-d0_s4" data-properties="branch pubescence;branchlet pubescence">branches and branchlets sometimes weakly glaucous.</span> <span class="statement" id="st-d0_s5" data-properties="stipule presence;stipule prominence;stipule presence"><b>Leaves </b>(marcescent but not skeletonized), stipules usually absent or rudimentary, rarely present on late ones;</span> <span class="statement" id="st-d0_s6" data-properties="petiole atypical some measurement;petiole some measurement">petiole (convex, or shallowly to deeply grooved, flat), 0.4–4.6 (–5.5) mm, (glabrous adaxially);</span> <span class="statement" id="st-d0_s7" data-properties="largest medial blade shape;largest medial blade shape;largest medial blade shape;largest medial blade shape;largest medial blade shape;largest medial blade length;largest medial blade width;largest medial blade l w ratio;base shape;base shape;margin prominence or shape;margin architecture or shape;margin architecture or pubescence or shape;apex shape;apex shape;apex shape;apex shape;apex shape;apex shape;abaxial surface pubescence;adaxial surface reflectance;adaxial surface pubescence">largest medial blade (2 pairs of secondary-veins arising at or close to base, arcing toward apex) broadly elliptic, subcircular, or circular, 1.9–16.3 × 3–10.5 mm, 0.84–1.17 (–2.53) times as long as wide, base rounded or convex, margins flat, entire, ciliate, apex retuse, rounded, convex, or acute, abaxial surface glabrous, adaxial highly glossy, glabrous;</span> <span class="statement" id="st-d0_s8" data-properties="blade margin architecture or shape">proximal blade margins entire;</span> <span class="statement" id="st-d0_s9" data-properties="blade life cycle;blade pubescence;blade pubescence">juvenile blade glabrous or puberulent.</span> <span class="statement" id="st-d0_s10" data-properties=""><b>Catkins </b>from subterminal buds;</span> <span class="statement" id="st-d0_s11" data-properties="catkin architecture">staminate subglobose, stout, or indeterminate, 3.3–18.5 × 2.5–12 mm, flowering branchlet 0.5–9 mm;</span> <span class="statement" id="st-d0_s12" data-properties="branchlet shape;branchlet fragility or size;branchlet development;branchlet life cycle;branchlet some measurement;branchlet architecture;branchlet architecture;branchlet fragility or size;branchlet shape;branchlet shape;branchlet development;branchlet life cycle;branchlet some measurement">pistillate moderately densely to loosely flowered (2–15 flowers), stout, subglobose, globose, or indeterminate, 4.5–35 × 2–17 mm, flowering branchlet 0.5–22 mm;</span> <span class="statement" id="st-d0_s13" data-properties="floral bract coloration;floral bract some measurement;apex shape;apex shape;apex architecture or shape;apex pubescence;apex architecture or pubescence or shape;hair shape;hair shape;hair shape;hair course">floral bract brown, 1.6–2.8 mm, apex rounded or retuse, entire, abaxially sparsely hairy or ciliate, hairs usually wavy, crinkled or curly, rarely straight.</span> <span class="statement" id="st-d0_s14" data-properties="flower architecture;abaxial nectary some measurement;adaxial nectary shape;adaxial nectary shape;adaxial nectary some measurement;nectary fusion"><b>Staminate </b>flowers: abaxial nectary 0.5–1 mm, adaxial nectary narrowly oblong or oblong, 0.8–1.4 mm, nectaries distinct;</span> <span class="statement" id="st-d0_s15" data-properties="flower architecture;filament fusion;filament fusion;filament lengths;filament pubescence">filaments distinct or connate less than 1/2 their lengths, glabrous;</span> <span class="statement" id="st-d0_s16" data-properties="flower architecture;anther shape;anther shape;anther some measurement">anthers ellipsoid or globose, 0.4–0.6 mm.</span> <span class="statement" id="st-d0_s17" data-properties="flower architecture;abaxial nectary presence;abaxial nectary presence;adaxial nectary shape;adaxial nectary shape;adaxial nectary shape;adaxial nectary some measurement;adaxial nectary length or size"><b>Pistillate </b>flowers: abaxial nectary present or absent, adaxial nectary usually narrowly oblong or oblong, sometimes flask-shaped, 0.8–2 mm, longer than stipe;</span> <span class="statement" id="st-d0_s18" data-properties="flower architecture;stipe some measurement">stipe 0.4–0.8 mm;</span> <span class="statement" id="st-d0_s19" data-properties="flower architecture;ovary shape;ovary pubescence;ovary pubescence">ovary pyriform, glabrous or puberulent, (hairs in patches, especially on beak), beak slightly bulged below styles;</span> <span class="statement" id="st-d0_s20" data-properties="flower architecture;ovule quantity">ovules 7–17 per ovary;</span> <span class="statement" id="st-d0_s21" data-properties="flower architecture;style fusion;style fusion;style some measurement">styles connate or slightly distinct distally, 0.5–1 mm;</span> <span class="statement" id="st-d0_s22" data-properties="flower architecture;stigma prominence or shape;stigma relief;stigma shape;stigma some measurement;tip shape">stigmas flat, abaxially non-papillate with pointed tip, or slenderly or broadly cylindrical, 0.28–0.6 mm.</span> <span class="statement" id="st-d0_s23" data-properties="capsule some measurement"><b>Capsules </b>3.8–8.3 mm.</span><!--

-->{{Treatment/Body
|distribution=N.W.T.;Yukon;Alaska;Mont.;Wyo.;e Asia
|discussion=<p>Varieties 2 (2 in the flora).</p><!--
--><p>Salix rotundifolia is closely related to S. polaris, from which it can be separated by its glabrous ovaries and fewer-flowered catkins. They also differ somewhat in leaf venation: S. rotundifolia typically having three main veins arising from the leaf base, often only one or two pair of secondary veins, and no or indistinct tertiary veins; S. polaris typically having pinnate venation, multiple secondary veins, and distinct tertiary veins. Salix rotundifolia consists of two varieties, the diploid var. dodgeana and the hexaploid var. rotundifolia. In general, var. dodgeana is a high alpine species in the southern cordillera of Wyoming and Montana, the St. Elias Mountains in Alaska and Yukon, the Mackenzie Mountains, Northwest Territories, and the Richardson Mountains, Yukon Territory. A diploid specimen of S. rotundifolia in the Cherski Mountains, Yakutia, Russia (B. A. Jurtzev and P. G. Zhukova 1982), which fits var. dodgeana in its 2–3-flowered catkins, relatively small leaves (3.5 × 3.9 mm), and small stomata (490 µm2), may represent an ancestral population. Variety rotundifolia usually occurs at lower elevations in Alaska and in easternmost Chukotka and Wrangel Island, Russia, but elevation separation is not distinct. There is a general correlation between stomatal size and ploidal level (W. Buechler, pers. comm.), but relatively large stomata in some diploid specimens of S. rotundifolia indicates a need for further cytological study. For the present, it is best to recognize the two cytotypes as varieties.</p><!--
--><p>Hybrids:</p><!--
--><p>Salix rotundifolia forms natural hybrids with S. arctica, S. phlebophylla, and S. polaris.</p>
|tables=
|references=
}}<!--

--><div class="treatment-key">
==Key==
<div class="treatment-key-group">
  
{| class="wikitable fna-keytable"
|-id=key-0-1
|1
|Pistillate catkins: (3-)4-7-15 flowers; largest medial blades 4.5-8-16.3 mm, 0.92-1.23-2.27 times as long as wide; petioles 0.5-2-4.6 (-5.5) mm; floral bracts: hairs usually wavy, some straight, curly, or crinkled, exceeding bract by 0.32-0.71-1.25(-2.4) mm; pistillate flowers: abaxial nectaries present or absent; 2n = 114.
|[[Salix rotundifolia var. rotundifolia|Salix rotundifolia var. rotundifolia]]
|-id=key-0-1
|1
|Pistillate catkins: 2-4-9 flowers; largest medial blades 2.9-6.1-7.4 mm, 0.84-1.5-2.2 times as long as wide; petioles 0.4-1.1-2.8 mm; floral bracts: hairs usually wavy, crinkled, or curly, rarely straight, exceeding bract by 0.1-0.37-0.75 mm; pistillate flowers: abaxial nectaries absent; 2n = 38.
|[[Salix rotundifolia var. dodgeana|Salix rotundifolia var. dodgeana]]
|}
</div></div><!--

-->{{#Taxon:
name=Salix rotundifolia
|authority=Trautvetter
|rank=species
|parent rank=section
|synonyms=
|basionyms=
|family=Salicaceae
|distribution=N.W.T.;Yukon;Alaska;Mont.;Wyo.;e Asia
|reference=None
|publication title=Nouv. Mém. Soc. Imp. Naturalistes Moscou
|publication year=1832
|special status=
|source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/84153f6d59a0a91d69695978a64cee7560374f8e/V7/V7_65.xml
|genus=Salix
|subgenus=Salix subg. Chamaetia
|section=Salix sect. Herbella
|species=Salix rotundifolia
|abaxial nectary presence=absent;absent
|abaxial nectary some measurement=0.5mm;1mm
|abaxial surface pubescence=glabrous
|adaxial nectary length or size=longer
|adaxial nectary shape=flask--shaped;oblong;oblong;oblong;oblong
|adaxial nectary some measurement=0.8mm;2mm
|adaxial surface pubescence=glabrous
|adaxial surface reflectance=glossy
|anther shape=globose;ellipsoid
|anther some measurement=0.4mm;0.6mm
|apex architecture or pubescence or shape=ciliate
|apex architecture or shape=entire
|apex pubescence=hairy
|apex shape=retuse;rounded;acute;convex;acute;convex;rounded;retuse
|base shape=convex;rounded
|blade life cycle=juvenile
|blade margin architecture or shape=entire
|blade pubescence=puberulent;glabrous
|branch coloration=gray-brown;yellowbrown;gray-brown;yellowbrown;yellow-green
|branch pubescence=glaucous;glabrous
|branchlet architecture=flowered;pistillate
|branchlet coloration=redbrown;yellowbrown
|branchlet development=indeterminate;indeterminate
|branchlet fragility or size=stout;stout
|branchlet life cycle=flowering;flowering
|branchlet pubescence=glaucous;glabrous
|branchlet shape=globose;subglobose;subglobose
|branchlet some measurement=0.5mm;22mm
|capsule some measurement=3.8mm;8.3mm
|catkin architecture=staminate
|filament fusion=connate;distinct
|filament lengths=0;1/2
|filament pubescence=glabrous
|floral bract coloration=brown
|floral bract some measurement=1.6mm;2.8mm
|flower architecture=pistillate;pistillate;pistillate;pistillate;pistillate;pistillate;staminate;staminate;staminate
|hair course=straight
|hair shape=curly;crinkled;wavy
|largest medial blade l w ratio=0.84-1.17(-2.53)
|largest medial blade length=1.9mm;16.3mm
|largest medial blade shape=circular;subcircular;circular;subcircular;elliptic
|largest medial blade width=3mm;10.5mm
|margin architecture or pubescence or shape=ciliate
|margin architecture or shape=entire
|margin prominence or shape=flat
|nectary fusion=distinct
|ovary pubescence=puberulent;glabrous
|ovary shape=pyriform
|ovule quantity=7;17
|petiole atypical some measurement=4.6mm;5.5mm
|petiole some measurement=0.4mm;4.6mm
|stem orientation=erect
|stigma prominence or shape=flat
|stigma relief=non-papillate
|stigma shape=cylindrical
|stigma some measurement=0.28mm;0.6mm
|stipe some measurement=0.4mm;0.8mm
|stipule presence=absent;absent
|stipule prominence=rudimentary
|style fusion=distinct;connate
|style some measurement=0.5mm;1mm
|tip shape=pointed
|whole_organism growth form=plant
|whole_organism some measurement=0.005m;0.05m
}}<!--

-->[[Category:Treatment]][[Category:Salix sect. Herbella]]