View source for Potentilla villosa

{{Treatment/ID
|accepted_name=Potentilla villosa
|accepted_authority=Pallas ex Pursh
|publications={{Treatment/Publication
|title=Fl. Amer. Sept.
|place=1: 353. 1813
|year=1813
}}
|common_names=Villous cinquefoil
|special_status={{Treatment/ID/Special_status
|code=F
|label=Selected by author to be illustrated
}}
|basionyms=
|synonyms={{Treatment/ID/Synonym
|name=Potentilla villosa var. parviflora
|authority=C. L. Hitchcock
}}
|hierarchy=Rosaceae;Rosaceae subfam. Rosoideae;Rosaceae tribe Potentilleae;Potentilla;Potentilla sect. Niveae;Potentilla villosa
|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. Niveae]]</div><div class="higher-taxon"><small>species</small>[[Potentilla villosa]]</div></div>
|volume=Volume 9
|mention_page=page 196, 197, 202
|treatment_page=page 201
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>± to densely tufted. <b>Caudex</b> branches stout, sometimes short-columnar, not sheathed with marcescent whole leaves. <b>Stems</b> ascending, 0.5–2(–2.5) dm, lengths 1.5–3 times basal leaves. <b>Basal</b> leaves 2–12(–15) cm; petiole 1–9(–12) cm, long hairs ± abundant to dense, spreading to ascending, 1–2.5(–3) mm, soft to weak, smooth, crisped hairs absent or sparse, cottony hairs absent, glands sparse to common, sometimes obscured; leaflets usually ± overlapping, central broadly obovate to suborbiculate, (0.5–)1.5–2.5(–3) × (0.5–)1.5–2.6(–3.2) cm, sessile to subsessile, base cuneate to rounded, margins revolute, distal 1/2–2/3(–3/4) incised 1/4–1/2 to midvein, teeth 3–6(–7) per side, ± approximate to ± distant, surfaces ± dissimilar, abaxial yellowish or grayish white, long hairs 1–2 mm, cottony-crisped hairs ± dense, adaxial grayish green, long hairs abundant to dense, crisped hairs absent, sparse, or obscured. <b>Cauline</b> leaves (0–)1–2. <b>Inflorescences</b> (1–)2–7(–10)-flowered. <b>Pedicels</b> 0.5–3(–4) cm in flower, to 4 cm in fruit. <b>Flowers</b>: epicalyx bractlets ovate to oval-elliptic, 3–8 × 2–5 mm, 2/3 to as wide as sepals, margins strongly revolute, red glands absent; hypanthium 5–7 mm diam.; sepals 4–8 mm, apex ± acute; petals (5–)7–15 × 7–16 mm, significantly longer than sepals; filaments 1.8–2.1 mm, anthers 0.7–0.8 mm; carpels 150–250, apical hairs usually absent, rarely present (cottony), styles narrowly conic to tapered, ± papillate-swollen on proximal 1/5–1/2, 0.9–1.1 mm. <b>Achenes</b> 0.9–1.3 mm. <b>2n</b> = 14.</span><!--

-->{{Treatment/Body
|phenology=Flowering spring–summer.
|habitat=Sea cliffs, gravel beaches, inland on alpine outcrops (primarily southern populations), pumice barrens, scree and rock ledges
|elevation=0–100(–1800) m
|distribution=B.C.;Alaska;Oreg.;Wash.;e Asia (Russian Far East).
|discussion=<p><i>Potentilla villosa</i> is the only documented diploid species of sect. Niveae in North America and, almost certainly, it is fully sexual. It is a characteristic species of coarse-grained beaches and coastal cliffs from southwestern British Columbia to western Alaska and the Russian Far East, and also occurs on scattered mountains in the Olympic Peninsula and Cascade Range of Washington and Oregon (providing the higher elevational extreme). These southern populations, which have been called <i></i></i>var.<i><i> parviflora</i>, tend to be smaller, more delicate, less hairy plants in general, with fewer and smaller flowers. At least some plants in some southern populations also have cottony hairs on the carpels.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Potentilla villosa
|author=
|authority=Pallas ex Pursh
|rank=species
|parent rank=section
|synonyms=Potentilla villosa var. parviflora
|basionyms=
|family=Rosaceae
|phenology=Flowering spring–summer.
|habitat=Sea cliffs, gravel beaches, inland on alpine outcrops (primarily southern populations), pumice barrens, scree and rock ledges
|elevation=0–100(–1800) m
|distribution=B.C.;Alaska;Oreg.;Wash.;e Asia (Russian Far East).
|reference=None
|publication title=Fl. Amer. Sept.
|publication year=1813
|special status=Selected by author to be illustrated
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f6b125a955440c0872999024f038d74684f65921/coarse_grained_fna_xml/V9/V9_305.xml
|subfamily=Rosaceae subfam. Rosoideae
|tribe=Rosaceae tribe Potentilleae
|genus=Potentilla
|section=Potentilla sect. Niveae
|species=Potentilla villosa
}}<!--

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