Difference between revisions of "Thalictrum arkansanum"
Rhodora 46: 433. 1944.
Conservation concernEndemic
Treatment appears in FNA Volume 3.
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| − | --><span class="statement" id="st- | + | --><span class="statement" id="st-undefined" data-properties=""><b>Roots </b>brown, thick, tuberous. <b>Stems</b> decumbent, 20-40 cm, glabrous. <b>Leaves</b>: distal cauline long-petiolate. <b>Leaf</b> blade 1-3×-ternately compound; leaflets ovate to obovate to reniform or orbiculate, 3-(or more)-lobed, largest leaflets less than 15 mm wide, lobe margins crenate, surfaces glabrous. <b>Inflorescences</b> terminal, racemes, few flowered. <b>Flowers</b>: sepals whitish, ovate or elliptic, 0.9-2.8(-3) mm; filaments colored, 2-3 mm; anthers 1.8-2.3 mm, mucronate, tip 0.1-0.4 mm; stigma color unknown. <b>Achenes</b> few, not reflexed, nearly sessile; stipe 0.1-0.3 mm; body ellipsoid to oblong, 3.5-4.5 × 1.5-2 mm, glabrous, veins 10-12, not anastomosing-reticulate; beak (1.3-)2.3-3 mm.</span><!-- |
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|distribution=Ark.;Okla.;Tex. | |distribution=Ark.;Okla.;Tex. | ||
|discussion=<p>Of conservation concern.</p><!-- | |discussion=<p>Of conservation concern.</p><!-- | ||
| − | --><p>Poorly known, Thalictrum arkansanum is closely related to T. texanum and T. debile; it possibly should be considered as a variety of the latter.</p> | + | --><p>Poorly known, <i>Thalictrum arkansanum</i> is closely related to <i>T. texanum</i> and <i>T. debile</i>; it possibly should be considered as a variety of the latter.</p> |
|tables= | |tables= | ||
|references= | |references= | ||
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-->{{#Taxon: | -->{{#Taxon: | ||
name=Thalictrum arkansanum | name=Thalictrum arkansanum | ||
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|authority=B. Boivin | |authority=B. Boivin | ||
|rank=species | |rank=species | ||
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|publication year=1944 | |publication year=1944 | ||
|special status=Conservation concern;Endemic | |special status=Conservation concern;Endemic | ||
| − | |source xml=https:// | + | |source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V3/V3_907.xml |
|genus=Thalictrum | |genus=Thalictrum | ||
|section=Thalictrum sect. Heterogamia | |section=Thalictrum sect. Heterogamia | ||
|species=Thalictrum arkansanum | |species=Thalictrum arkansanum | ||
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-->[[Category:Treatment]][[Category:Thalictrum sect. Heterogamia]] | -->[[Category:Treatment]][[Category:Thalictrum sect. Heterogamia]] | ||
Latest revision as of 21:52, 5 November 2020
Roots brown, thick, tuberous. Stems decumbent, 20-40 cm, glabrous. Leaves: distal cauline long-petiolate. Leaf blade 1-3×-ternately compound; leaflets ovate to obovate to reniform or orbiculate, 3-(or more)-lobed, largest leaflets less than 15 mm wide, lobe margins crenate, surfaces glabrous. Inflorescences terminal, racemes, few flowered. Flowers: sepals whitish, ovate or elliptic, 0.9-2.8(-3) mm; filaments colored, 2-3 mm; anthers 1.8-2.3 mm, mucronate, tip 0.1-0.4 mm; stigma color unknown. Achenes few, not reflexed, nearly sessile; stipe 0.1-0.3 mm; body ellipsoid to oblong, 3.5-4.5 × 1.5-2 mm, glabrous, veins 10-12, not anastomosing-reticulate; beak (1.3-)2.3-3 mm.
Phenology: Flowering early spring (Mar–Apr).
Habitat: Wet bottomland forest, sometimes upland woods
Elevation: 20-150 m
Distribution
Ark., Okla., Tex.
Discussion
Of conservation concern.
Poorly known, Thalictrum arkansanum is closely related to T. texanum and T. debile; it possibly should be considered as a variety of the latter.
Selected References
None.
Lower Taxa
None.