View source for Horkelia rydbergii

{{Treatment/ID
|accepted_name=Horkelia rydbergii
|accepted_authority=Elmer
|publications={{Treatment/Publication
|title=Bot. Gaz.
|place=39: 50. 1905
|year=1905
}}
|common_names=Rydberg’s horkelia
|special_status={{Treatment/ID/Special_status
|code=E
|label=Endemic
}}
|basionyms=
|synonyms={{Treatment/ID/Synonym
|name=Horkelia bernardina
|authority=Rydberg
|rank=species
}} {{Treatment/ID/Synonym
|name=H. bolanderi subsp. parryi
|authority=(S. Watson) D. D. Keck
|rank=subspecies
}} {{Treatment/ID/Synonym
|name=H. bolanderi var. parryi
|authority=S. Watson
|rank=variety
}} {{Treatment/ID/Synonym
|name=Potentilla bolanderi var. parryi
|authority=(S. Watson) Munz & I. M. Johnston
|rank=variety
}}
|hierarchy=Rosaceae;Rosaceae subfam. Rosoideae;Rosaceae tribe Potentilleae;Horkelia;Horkelia sect. Horkelia;Horkelia rydbergii
|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 rydbergii]]</div></div>
|volume=Volume 9
|mention_page=page 252, 254
|treatment_page=page 251
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>tufted to ± matted, usually grayish to grayish green. <b>Stems</b> ascending to erect, (1–)2–7 dm, hairs ascending to appressed. <b>Basal</b> leaves ± planar, (4–)8–20(–30) × 0.8–2(–3) cm; stipules entire; leaflets 7–14 per side, separate to ± overlapping at least distally, cuneate to flabellate, (3–)5–15(–22) × 3–10(–15) mm, ± 1/2 to as wide as long, divided ± 1/3 to midrib into (3–)5–10 acute to obtuse teeth, densely (to sparsely) strigose or pilose. <b>Cauline</b> leaves (2 or)3–6(–8). <b>Inflorescences</b> ± open to congested, flowers arranged individually or in glomerules. <b>Pedicels</b> (1–)2–8 mm. <b>Flowers</b> 10–15 mm diam.; epicalyx bractlets lanceolate to narrowly elliptic, 2–3.5(–4) × 0.5–1 mm, ± 3/4 length of sepals, entire; hypanthium 1–1.5(–2) × 2.5–4.5(–6) mm, less than 1/2 as deep as wide, interior pilose; sepals spreading to ± reflexed, lanceolate, (2.5–)3–5(–5.2) mm; petals oblong to oblanceolate, 4–5.5 × 1.2–2.5 mm, apex rounded to truncate or slightly emarginate; filaments 0.5–2 × 0.5–1 mm, anthers 0.6–1 mm; carpels 20–50(–120); styles 2–4 mm. <b>Achenes</b> light to dark brown, 1–1.5 mm, smooth or roughened.</span><!--

-->{{Treatment/Body
|phenology=Flowering summer.
|habitat=Dry to moist meadows and stream banks, in conifer woodlands
|elevation=1200–2800 m
|distribution=Calif.
|discussion=<p><i>Horkelia rydbergii</i> occurs in the Transverse Ranges of Kern, Los Angeles, San Bernardino, and Ventura counties. Reports from farther north (as <i>H. bolanderi</i> <i></i>var.<i> parryi</i>) are referable to <i>H. marinensis</i>, <i>H. yadonii</i>, or, possibly, <i>H. cuneata</i>. Although there has been occasional nomenclatural confusion between this taxon (as <i>H. bolanderi</i> <i></i>var.<i> parryi</i>) and <i>H. parryi</i> Greene, the two are taxonomically and geographically distinct.</p><!--
--><p>Plants in the Mount Pinos–Lockwood Valley area of Kern and Ventura counties, and on Frazier Mountain, are distinctly gray with an abundance of tightly curled hairs. The leaves tend to be relatively short (to 8 cm) with relatively small leaflets (3–6 mm) on the basal leaves. Stems are relatively short (to 3 dm), and the fruits are dark brown, distinctly rugose, and 1.3–1.5 mm. This phase (including the type of <i>Horkelia rydbergii</i>) abruptly gives way to a grayish green phase with a slightly less dense, pilose indument in the San Bernardino and San Gabriel mountains. Here the plants tend to have larger basal leaves (to 30 cm) and leaflets (5–12 mm), longer stems (to 7 dm), and fruits that are a lighter brown, mostly smooth, and 1–1.2 mm. This phase in turn grades into even less densely hairy plants near Bear Lake, where the type of <i>H. bolanderi</i> <i></i>var.<i> parryi</i> was obtained.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Horkelia rydbergii
|authority=Elmer
|rank=species
|parent rank=section
|synonyms=Horkelia bernardina;H. bolanderi subsp. parryi;H. bolanderi var. parryi;Potentilla bolanderi var. parryi
|basionyms=
|family=Rosaceae
|phenology=Flowering summer.
|habitat=Dry to moist meadows and stream banks, in conifer woodlands
|elevation=1200–2800 m
|distribution=Calif.
|reference=None
|publication title=Bot. Gaz.
|publication year=1905
|special status=Endemic
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f50eec43f223ca0e34566be0b046453a0960e173/coarse_grained_fna_xml/V9/V9_391.xml
|subfamily=Rosaceae subfam. Rosoideae
|tribe=Rosaceae tribe Potentilleae
|genus=Horkelia
|section=Horkelia sect. Horkelia
|species=Horkelia rydbergii
}}<!--

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