View source for Horkelia yadonii

{{Treatment/ID
|accepted_name=Horkelia yadonii
|accepted_authority=Ertter
|publications={{Treatment/Publication
|title=Syst. Bot.
|place=18: 139, fig. 2. 1993
|year=1993
}}
|common_names=Yadon’s or Santa Lucia horkelia
|special_status={{Treatment/ID/Special_status
|code=C
|label=Conservation concern
}}{{Treatment/ID/Special_status
|code=E
|label=Endemic
}}
|basionyms=
|synonyms=
|hierarchy=Rosaceae;Rosaceae subfam. Rosoideae;Rosaceae tribe Potentilleae;Horkelia;Horkelia sect. Horkelia;Horkelia yadonii
|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>[[Horkelia]]</div><div class="higher-taxon"><small>section</small>[[Horkelia sect. Horkelia]]</div><div class="higher-taxon"><small>species</small>[[Horkelia yadonii]]</div></div>
|volume=Volume 9
|mention_page=page 250, 251, 252
|treatment_page=page 253
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>tufted to matted, ± grayish green. <b>Stems</b> ascending to erect, (0.5–)2–6(–7) dm, hairs spreading. <b>Basal</b> leaves ± planar, (3–)6–20(–32) × 0.5–1.5(–2) cm; stipules entire; leaflets 7–16 per side, separate to ± overlapping especially distally, broadly cuneate to nearly round, (3–)4–15(–17) × (2–)5–12 mm, 3/4 to nearly as wide as long, divided 1/5–1/2 to midrib into (3–)8–15(–30) acute to obtuse teeth, often medially notched as well 1/3–2/3 to midrib, villous. <b>Cauline</b> leaves 3–5. <b>Inflorescences</b> open, flowers arranged individually and in glomerules. <b>Pedicels</b> 1–7(–20) mm. <b>Flowers</b> 8–12 mm diam.; epicalyx bractlets lanceolate to ovate, 1.5–4.5 × 1–2(–2.5) mm, 1/2–3/4 length of sepals, entire; hypanthium 1.5–3 × 3–6.5 mm, less than 1/2 as deep as wide, interior sparsely pilose; sepals spreading to ± reflexed, lanceolate, (3–)4–6.5 mm; petals broadly oblanceolate-elliptic, 3–5.5 × 2–3 mm, apex truncate; filaments 1–2 × 0.5–1 mm, anthers 0.8–1.2 mm; carpels 20–60; styles 2.5–3 mm. <b>Achenes</b> brown, 1.5 mm, smooth.</span><!--

-->{{Treatment/Body
|phenology=Flowering summer.
|habitat=Granitic sand, meadows, along stream banks, in chaparral, conifer woodlands
|elevation=300–1900 m
|distribution=Calif.
|discussion=<p>Of conservation concern.</p><!--
--><p><i>Horkelia yadonii</i> is known only from localized populations in the La Panza, San Rafael, and Santa Lucia ranges of Monterey, San Luis Obispo, and Santa Barbara counties. The isolated populations often differ in such characters as general size, leaf proportions, and shape of epicalyx bractlets. The most distinctive extreme, in Monterey County, is characterized by relatively long, narrow leaves, small, few-toothed leaflets, long pedicels, few small flowers, and ovate bractlets. These differences, however, are not consistently or sharply defined.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Horkelia yadonii
|author=
|authority=Ertter
|rank=species
|parent rank=section
|synonyms=
|basionyms=
|family=Rosaceae
|phenology=Flowering summer.
|habitat=Granitic sand, meadows, along stream banks, in chaparral, conifer woodlands
|elevation=300–1900 m
|distribution=Calif.
|reference=None
|publication title=Syst. Bot.
|publication year=1993
|special status=Conservation concern;Endemic
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/8f726806613d60c220dc4493de13607dd3150896/coarse_grained_fna_xml/V9/V9_396.xml
|subfamily=Rosaceae subfam. Rosoideae
|tribe=Rosaceae tribe Potentilleae
|genus=Horkelia
|section=Horkelia sect. Horkelia
|species=Horkelia yadonii
}}<!--

-->[[Category:Treatment]][[Category:Horkelia sect. Horkelia]]