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| − | --><span class="statement" id="st-d0_s0" data-properties="stem orientation;stem relief;stem some measurement"><b>Stems </b>erect, coarse, 50-300 cm.</span> <span class="statement" id="st-d0_s1" data-properties="leaf position;leaf position"><b>Leaves </b>basal and cauline;</span> <span class="statement" id="st-d0_s2" data-properties="basal and proximal cauline leaf architecture;distal cauline leaf architecture">basal and proximal cauline leaves petiolate, distal cauline sessile;</span> <span class="statement" id="st-d0_s3" data-properties="petiole pubescence;rachis pubescence">petioles and rachises frequently pubescent.</span> <span class="statement" id="st-d0_s4" data-properties="leaf-blade architecture"><b>Leaf-</b>blade ternately and pinnately decompound;</span> <span class="statement" id="st-d0_s5" data-properties="leaflet coloration;leaflet coloration;leaflet coloration;leaflet shape;leaflet shape;leaflet shape;leaflet shape;leaflet shape;leaflet shape;leaflet shape;leaflet shape;leaflet length;leaflet width;leaflet l w ratio;leaflet texture;leaflet texture;leaflet texture;margin shape or vernation;lobe margin architecture or shape;surface pubescence;surface pubescence;surface pubescence">leaflets light to dark green, cordate or nearly orbiculate to ovate or obovate, apically undivided to 2-3 (-5) -lobed or toothed, 11-68 × 5-70 mm, length 0.8-2.6 times width, membranous to firm, margins scarcely revolute, lobe margins entire, surfaces abaxially pubescent to glabrous.</span> <span class="statement" id="st-d0_s6" data-properties="inflorescence shape;inflorescence quantity;inflorescence architecture;raceme shape;raceme quantity;raceme architecture;panicle shape;panicle quantity;panicle architecture"><b>Inflorescences </b>racemes or panicles to corymbs, apically ± rounded, many flowered;</span> <span class="statement" id="st-d0_s7" data-properties="peduncle pubescence;pedicel pubescence">peduncles and pedicels often pubescent.</span> <span class="statement" id="st-d0_s8" data-properties="flower reproduction;flower reproduction"><b>Flowers </b>unisexual or bisexual (sometimes bisexual with very few stamens);</span> <span class="statement" id="st-d0_s9" data-properties="sepal atypical quantity;sepal quantity;sepal coloration;sepal coloration;sepal coloration;sepal shape;sepal some measurement">sepals 4 (-6), white to purplish, elliptic-rounded, 2-3.5 mm;</span> <span class="statement" id="st-d0_s10" data-properties="filament orientation;filament coloration;filament coloration;filament coloration;filament shape;filament shape;filament shape;filament some measurement;filament texture">filaments ascending, white to purplish, filiform to distinctly clavate, 1.5-7 mm, usually rigid;</span> <span class="statement" id="st-d0_s11" data-properties="anther atypical some measurement;anther some measurement;anther shape;anther shape">anthers 0.5-1.5 (-2.1) mm, usually blunt or only slightly apiculate.</span> <span class="statement" id="st-d0_s12" data-properties="achene quantity;achene architecture;achene architecture;achene architecture"><b>Achenes </b>numerous, sessile to stipitate;</span> <span class="statement" id="st-d0_s13" data-properties="stipe atypical some measurement;stipe some measurement">stipe 0.5-1.5 (-2.4) mm;</span> <span class="statement" id="st-d0_s14" data-properties="body shape;body some measurement;body architecture;body pubescence">body ellipsoid, 3-5 mm, prominently veined, usually pubescent;</span> <span class="statement" id="st-d0_s15" data-properties="">beak usually persistent, straight or coiled distally, 0.6-2.5 mm, about 1/2 length of achene body.</span> <span class="statement" id="st-d0_s16" data-properties="beak duration;beak course;beak architecture;beak some measurement;beak length;2n chromosome quantity">2n = 126.</span><!-- | + | --><span class="statement" id="st-undefined" data-properties=""><b>Stems </b>erect, coarse, 50-300 cm. <b>Leaves</b> basal and cauline; basal and proximal cauline leaves petiolate, distal cauline sessile; petioles and rachises frequently pubescent. <b>Leaf</b> blade ternately and pinnately decompound; leaflets light to dark green, cordate or nearly orbiculate to ovate or obovate, apically undivided to 2-3(-5)-lobed or -toothed, 11-68 × 5-70 mm, length 0.8-2.6 times width, membranous to firm, margins scarcely revolute, lobe margins entire, surfaces abaxially pubescent to glabrous. <b>Inflorescences</b> racemes or panicles to corymbs, apically ± rounded, many flowered; peduncles and pedicels often pubescent. <b>Flowers</b> unisexual or bisexual (sometimes bisexual with very few stamens); sepals 4(-6), white to purplish, elliptic-rounded, 2-3.5 mm; filaments ascending, white to purplish, filiform to distinctly clavate, 1.5-7 mm, usually rigid; anthers 0.5-1.5(-2.1) mm, usually blunt or only slightly apiculate. <b>Achenes</b> numerous, sessile to stipitate; stipe 0.5-1.5(-2.4) mm; body ellipsoid, 3-5 mm, prominently veined, usually pubescent; beak usually persistent, straight or coiled distally, 0.6-2.5 mm, about 1/2 length of achene body. <b>2n</b> = 126.</span><!-- |
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| | |publication year=1817 | | |publication year=1817 |
| | |special status=Endemic;Selected by author to be illustrated;Weedy | | |special status=Endemic;Selected by author to be illustrated;Weedy |
| − | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/287ef3db526bd807d435a3c7423ef2df1e951227/V3/V3_799.xml | + | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/9216fc802291cd3df363fd52122300479582ede7/coarse_grained_fna_xml/V3/V3_799.xml |
| | |genus=Thalictrum | | |genus=Thalictrum |
| | |section=Thalictrum sect. Leucocoma | | |section=Thalictrum sect. Leucocoma |
| | |species=Thalictrum pubescens | | |species=Thalictrum pubescens |
| − | |2n chromosome quantity=126
| |
| − | |achene architecture=sessile;stipitate
| |
| − | |achene quantity=numerous
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| − | |anther atypical some measurement=1.5mm;2.1mm
| |
| − | |anther shape=apiculate;blunt
| |
| − | |anther some measurement=0.5mm;1.5mm
| |
| − | |basal and proximal cauline leaf architecture=petiolate
| |
| − | |beak architecture=coiled
| |
| − | |beak course=straight
| |
| − | |beak duration=persistent
| |
| − | |beak length=1/2 length of achene body
| |
| − | |beak some measurement=0.6mm;2.5mm
| |
| − | |body architecture=veined
| |
| − | |body pubescence=pubescent
| |
| − | |body shape=ellipsoid
| |
| − | |body some measurement=3mm;5mm
| |
| − | |distal cauline leaf architecture=sessile
| |
| − | |filament coloration=white;purplish
| |
| − | |filament orientation=ascending
| |
| − | |filament shape=filiform;distinctly clavate
| |
| − | |filament some measurement=1.5mm;7mm
| |
| − | |filament texture=rigid
| |
| − | |flower reproduction=bisexual;unisexual
| |
| − | |inflorescence architecture=flowered
| |
| − | |inflorescence quantity=many
| |
| − | |inflorescence shape=rounded
| |
| − | |leaf position=cauline;basal
| |
| − | |leaf-blade architecture=decompound
| |
| − | |leaflet coloration=light;dark green
| |
| − | |leaflet l w ratio=0.8-2.6
| |
| − | |leaflet length=11mm;68mm
| |
| − | |leaflet shape=toothed;2-3(-5)-lobed;undivided;nearly orbiculate;ovate or obovate
| |
| − | |leaflet texture=membranous;firm
| |
| − | |leaflet width=5mm;70mm
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| − | |lobe margin architecture or shape=entire
| |
| − | |margin shape or vernation=revolute
| |
| − | |panicle architecture=flowered
| |
| − | |panicle quantity=many
| |
| − | |panicle shape=rounded
| |
| − | |pedicel pubescence=pubescent
| |
| − | |peduncle pubescence=pubescent
| |
| − | |petiole pubescence=pubescent
| |
| − | |raceme architecture=flowered
| |
| − | |raceme quantity=many
| |
| − | |raceme shape=rounded
| |
| − | |rachis pubescence=pubescent
| |
| − | |sepal atypical quantity=4;6
| |
| − | |sepal coloration=white;purplish
| |
| − | |sepal quantity=4
| |
| − | |sepal shape=elliptic-rounded
| |
| − | |sepal some measurement=2mm;3.5mm
| |
| − | |stem orientation=erect
| |
| − | |stem relief=coarse
| |
| − | |stem some measurement=50cm;300cm
| |
| − | |stipe atypical some measurement=1.5mm;2.4mm
| |
| − | |stipe some measurement=0.5mm;1.5mm
| |
| − | |surface pubescence=abaxially pubescent;glabrous
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| | -->[[Category:Treatment]][[Category:Thalictrum sect. Leucocoma]] | | -->[[Category:Treatment]][[Category:Thalictrum sect. Leucocoma]] |
Stems erect, coarse, 50-300 cm. Leaves basal and cauline; basal and proximal cauline leaves petiolate, distal cauline sessile; petioles and rachises frequently pubescent. Leaf blade ternately and pinnately decompound; leaflets light to dark green, cordate or nearly orbiculate to ovate or obovate, apically undivided to 2-3(-5)-lobed or -toothed, 11-68 × 5-70 mm, length 0.8-2.6 times width, membranous to firm, margins scarcely revolute, lobe margins entire, surfaces abaxially pubescent to glabrous. Inflorescences racemes or panicles to corymbs, apically ± rounded, many flowered; peduncles and pedicels often pubescent. Flowers unisexual or bisexual (sometimes bisexual with very few stamens); sepals 4(-6), white to purplish, elliptic-rounded, 2-3.5 mm; filaments ascending, white to purplish, filiform to distinctly clavate, 1.5-7 mm, usually rigid; anthers 0.5-1.5(-2.1) mm, usually blunt or only slightly apiculate. Achenes numerous, sessile to stipitate; stipe 0.5-1.5(-2.4) mm; body ellipsoid, 3-5 mm, prominently veined, usually pubescent; beak usually persistent, straight or coiled distally, 0.6-2.5 mm, about 1/2 length of achene body. 2n = 126.
Phenology: Flowering late spring–summer (mid Jun-early Aug).
Habitat: Full sun to deep shade, rich woods, low thickets, swamps, wet meadows, and stream banks
Elevation: 15-1500 m
Distribution
St. Pierre and Miquelon, N.B., Nfld., N.S., Ont., P.E.I., Que., Ala., Ark., Conn., Del., D.C., Ga., Ill., Ind., Ky., Maine, Md., Mass., Mich., Miss., N.H., N.J., N.Y., N.C., Ohio, Pa., R.I., S.C., Tenn., Vt., Va., W.Va.
Discussion
The ovaries change from white to purplish, becoming light green, then darker green, and finally brown as fruits mature.
Because of the polymorphic nature of Thalictrum pubescens, a proliferation of names for minor morphologic variants has resulted. Field studies (M. Park 1992) have shown that too much morphologic variation occurs within populations to support the recognition of previously described taxa. Plants in New England and northeastern Canada often have a corymbose inflorescence and longer filaments and achene beaks.
This species is often incorrectly treated in floras as T. polygamum Sprengel, an invalid name.
The Iroquois used Thalictrum pubescens medicinally a a wash for head and neck, to stop nosebleeds, and to treat gall (D. E. Moerman 1986).
Selected References
None.
