View source for Ivesia pickeringii

{{Treatment/ID
|accepted_name=Ivesia pickeringii
|accepted_authority=Torrey ex A. Gray
|publications={{Treatment/Publication
|title=Proc. Amer. Acad. Arts
|place=6: 531. 1865
|year=1865
}}
|common_names=Pickering’s ivesia
|special_status={{Treatment/ID/Special_status
|code=C
|label=Conservation concern
}}{{Treatment/ID/Special_status
|code=E
|label=Endemic
}}
|basionyms=
|synonyms={{Treatment/ID/Synonym
|name=Potentilla pickeringii
|authority=(Torrey ex A. Gray) Greene
|rank=species
}}
|hierarchy=Rosaceae;Rosaceae subfam. Rosoideae;Rosaceae tribe Potentilleae;Ivesia;Ivesia sect. Unguiculatae;Ivesia pickeringii
|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>[[Ivesia]]</div><div class="higher-taxon"><small>section</small>[[Ivesia sect. Unguiculatae]]</div><div class="higher-taxon"><small>species</small>[[Ivesia pickeringii]]</div></div>
|volume=Volume 9
|mention_page=page 238, 240
|treatment_page=page 239
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>grayish green; glands abundant. <b>Stems</b> ascending to erect, 3–5 dm. <b>Basal</b> leaves 8–20 cm; sheathing base ± strigose abaxially; stipules linear to narrowly lanceolate, 3–5 mm; petiole 1–3.5 cm, hairs abundant, ascending to spreading, 1–2 mm; leaflets 35–50 per side, loosely overlapping, 2–6 mm, lobes 3–5, oblanceolate to obovate or oval, hairs abundant, ± ascending, 1–2(–3) mm. <b>Cauline</b> leaves 5–10. <b>Inflorescences</b> 10–100-flowered, (1.5–)5–15 cm diam., flowers usually arranged individually, sometimes more congested. <b>Pedicels</b> (1–)2–10 mm. <b>Flowers</b> 8–13 mm diam.; epicalyx bractlets linear-lanceolate to lanceolate, (1.8–)2–2.5 mm; hypanthium cupulate to turbinate, 1.5–3 × 2.5–4 mm, often nearly as deep as wide; sepals often purple-suffused or -mottled, (2.5–)3–5 mm, acuminate; petals white, becoming pink-tinged with age, oblanceolate to narrowly spatulate, (2.8–)3–5(–6) mm; stamens 20, filaments filiform, 1.5–2.3 mm, anthers white to cream, 0.3–0.6 mm; carpels 2–4, styles 2.5–3.5 mm. <b>Achenes</b> dark brown, 2.5–3 mm.</span><!--

-->{{Treatment/Body
|phenology=Flowering summer.
|habitat=Moist, rocky, grassy meadows, mainly on ultramafic-derived clayey soil, in montane conifer woodlands
|elevation=800–1500 m
|distribution=Calif.
|discussion=<p>Of conservation concern.</p><!--
--><p><i>Ivesia pickeringii</i> is known from Siskiyou and Trinity counties. Some early treatments (for example, P. A. Rydberg 1898, 1908–1918; W. L. Jepson [1923–1925], 1909–1943, vol. 2) conflated this species with <i>I. aperta</i>, hence reports of <i>I. pickeringii</i> in the Sierra <i>Nevada</i>. Historic collections from Edgewood, at the headwaters of the Shasta River in Siskiyou County, have inflorescences more glomerulate than elsewhere in the species range.</p><!--
--><p>The chromosome count of 2n = 28 (P. A. Munz 1959) needs confirmation. If based on Kruckeberg 3665, which was distributed as a voucher for that count, the determination of this collection has been changed to <i>Ivesia sericoleuca</i>.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Ivesia pickeringii
|authority=Torrey ex A. Gray
|rank=species
|parent rank=section
|synonyms=Potentilla pickeringii
|basionyms=
|family=Rosaceae
|phenology=Flowering summer.
|habitat=Moist, rocky, grassy meadows, mainly on ultramafic-derived clayey soil, in montane conifer woodlands
|elevation=800–1500 m
|distribution=Calif.
|reference=None
|publication title=Proc. Amer. Acad. Arts
|publication year=1865
|special status=Conservation concern;Endemic
|source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-data-curation.git/src/bb6b7e3a7de7d3b7888a1ad48c7fd8f5c722d8d6/coarse_grained_fna_xml/V9/V9_370.xml
|subfamily=Rosaceae subfam. Rosoideae
|tribe=Rosaceae tribe Potentilleae
|genus=Ivesia
|section=Ivesia sect. Unguiculatae
|species=Ivesia pickeringii
}}<!--

-->[[Category:Treatment]][[Category:Ivesia sect. Unguiculatae]]