View source for Potentilla lasiodonta

{{Treatment/ID
|accepted_name=Potentilla lasiodonta
|accepted_authority=Rydberg in N. L. Britton et al.
|publications={{Treatment/Publication
|title=in N. L. Britton et al., N. Amer. Fl.
|place=22: 351. 1908
|year=1908
}}
|common_names=Sandhills cinquefoil
|special_status={{Treatment/ID/Special_status
|code=E
|label=Endemic
}}
|basionyms=
|synonyms={{Treatment/ID/Synonym
|name=Potentilla finitima
|authority=Kohli & Packer
}}
|hierarchy=Rosaceae;Rosaceae subfam. Rosoideae;Rosaceae tribe Potentilleae;Potentilla;Potentilla sect. Pensylvanicae;Potentilla lasiodonta
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Rosaceae]]</div><div class="higher-taxon"><small>subfamily</small>[[Rosaceae subfam. Rosoideae]]</div><div class="higher-taxon"><small>tribe</small>[[Rosaceae tribe Potentilleae]]</div><div class="higher-taxon"><small>genus</small>[[Potentilla]]</div><div class="higher-taxon"><small>section</small>[[Potentilla sect. Pensylvanicae]]</div><div class="higher-taxon"><small>species</small>[[Potentilla lasiodonta]]</div></div>
|volume=Volume 9
|mention_page=page 212, 213, 215
|treatment_page=page 214
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Stems </b>± erect, 2–4 dm. <b>Basal</b> leaves pinnate, 12–20(–30) cm; petiole 5–10(–15) cm, long hairs ± abundant, spreading to ascending, 0.5–1 mm, weak to ± stiff, short hairs abundant to dense, cottony or crisped hairs absent, glands sparse to abundant, often obscured; leaflets 4–6(–9) per side, on distal (1/3–)1/2–3/5 of leaf axis, slightly overlapping, terminal ones oblanceolate to narrowly elliptic, 3–6 × 0.8–1.2(–1.5) cm, margins strongly revolute, incised ± 1/2 to midvein, undivided medial blade 5–9 mm wide, teeth 8–12 per side, narrowly triangular to lanceolate, surfaces ± dissimilar, abaxial grayish, long hairs ± sparse (or not differentiated from short hairs), 0.5–1.5 mm, weak, short hairs abundant to dense, cottony or crisped hairs absent, glands sparse or obscured, adaxial ± green, straight hairs (long and short not differentiated) abundant, spreading to ascending, 0.2–0.5 mm, cottony and crisped hairs absent, glands sparse to abundant, often obscured. <b>Cauline</b> leaves (1–)2–4. <b>Inflorescences</b> 10–40-flowered, congested or elongating in fruit. <b>Pedicels</b> ± 0.1 cm (proximal to 1.2 cm). <b>Flowers</b>: epicalyx bractlets narrowly ovate-acuminate, (3–)4–8(–10) × 2–3 mm, lengths 1–2 times sepals, margins ± revolute; hypanthium (4–)5–10 mm diam.; sepals 3–5 mm, apex acute to obtuse, abaxial surfaces: venation moderate, glands ± abundant, obscured to evident; petals pale yellow, 3–5 × 2–4 mm, lengths ± equal to or shorter than sepals; filaments 1–1.5 mm, anthers 0.5–0.8 mm; carpels 80–90, styles papillate-swollen in proximal 3/4+, 1–1.2 mm. <b>Achenes</b> ± 1 mm, ± rugose. <b>2n</b> = 14.</span><!--

-->{{Treatment/Body
|phenology=Flowering summer.
|habitat=Sandy sites in prairies
|elevation=300–1100 m
|distribution=Alta.;Man.;Sask.;Minn.;N.Dak.
|discussion=<p><i>Potentilla lasiodonta</i> is a diploid relative of tetraploid <i>P. pensylvanica</i>, sharing similar velvety vestiture of dense short hairs, pinnate leaves, and epicalyx bractlets with revolute margins. The species differs in having larger epicalyx bractlets and less deeply incised leaflets. Plant height and leaf size are at the upper range of <i>P. pensylvanica</i>, and populations are evidently restricted to sandy substrates. Occurrence in Manitoba is based on B. L. Kohli and J. G. Packer (1976); no vouchers are in WIN. At least one collection from southeastern British Columbia (Brown 779, MO) approaches <i>P. lasiodonta</i>, but it is insufficient by itself to serve as a provincial record.</p><!--
--><p>The fundamental ploidy and epicalyx distinctions of this species were established by B. L. Kohli and J. G. Packer (1976), who proposed the name <i>Potentilla</i> finitima. As noted by J. Soják (1994), the type of <i>P. lasiodonta</i> is the same entity. <i>Potentilla</i> atrovirens Rydberg and <i>P. pensylvanica</i> var. arida B. Boivin have sometimes been applied to this taxon; the types of both names fall within the circumscription of <i>P. pensylvanica</i> in the narrow sense (Packer, pers. comm.).</p>
|tables=
|references=
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-->{{#Taxon:
name=Potentilla lasiodonta
|author=
|authority=Rydberg in N. L. Britton et al.
|rank=species
|parent rank=section
|synonyms=Potentilla finitima
|basionyms=
|family=Rosaceae
|phenology=Flowering summer.
|habitat=Sandy sites in prairies
|elevation=300–1100 m
|distribution=Alta.;Man.;Sask.;Minn.;N.Dak.
|reference=None
|publication title=in N. L. Britton et al., N. Amer. Fl.
|publication year=1908
|special status=Endemic
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f6b125a955440c0872999024f038d74684f65921/coarse_grained_fna_xml/V9/V9_322.xml
|subfamily=Rosaceae subfam. Rosoideae
|tribe=Rosaceae tribe Potentilleae
|genus=Potentilla
|section=Potentilla sect. Pensylvanicae
|species=Potentilla lasiodonta
}}<!--

-->[[Category:Treatment]][[Category:Potentilla sect. Pensylvanicae]]