View source for Horkelia daucifolia

{{Treatment/ID
|accepted_name=Horkelia daucifolia
|accepted_authority=(Greene) Rydberg
|publications={{Treatment/Publication
|title=Bull. Torrey Bot. Club
|place=25: 55. 1898
|year=1898
}}
|special_status={{Treatment/ID/Special_status
|code=E
|label=Endemic
}}
|basionyms={{Treatment/ID/Basionym
|name=Potentilla daucifolia
|authority=Greene
|rank=species
|publication_title=Pittonia
|publication_place=1: 160. 1888
}}
|synonyms=
|hierarchy=Rosaceae;Rosaceae subfam. Rosoideae;Rosaceae tribe Potentilleae;Horkelia;Horkelia sect. Tridentatae;Horkelia daucifolia
|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. Tridentatae]]</div><div class="higher-taxon"><small>species</small>[[Horkelia daucifolia]]</div></div>
|volume=Volume 9
|mention_page=page 265, 267
|treatment_page=page 266
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>rosette-forming to tufted, rarely ± matted, grayish or green. <b>Stems</b> ascending to erect, 1.5–3.5 dm, hairs 2–3 mm proximally, glands sparse to dense distally. <b>Basal</b> leaves weakly planar to loosely cylindric, (4–)5–12(–17) × 0.8–3(–4) cm, usually sericeous to villous, sometimes glabrate; stipules pinnately divided into 3–7 linear to filiform lobes; leaflets 5–10 per side, ± overlapping, obovate to broadly obcordate, 5–15(–25) × 5–20 mm, ± as wide as long, divided 3/4+ to midrib into (0–)2–15 linear to oblanceolate lobes 0.4–2(–3) mm wide, these not restricted to apex. <b>Cauline</b> leaves 3–6; stipules 8–15 mm, deeply 3–7-lobed proximally, 1–3-lobed distally. <b>Inflorescences</b> open to ± congested, flowers arranged individually or in ± corymbiform clusters. <b>Pedicels</b> 2–10(–20) mm. <b>Flowers</b> 10–15 mm diam.; epicalyx bractlets linear to linear-lanceolate, 2.5–3.5 × 0.5 mm, 2/3 to ± equal to length of sepals; hypanthium 1–1.5 × 3.5–5 mm, less than 1/2 as deep as wide, interior glabrous; sepals ± spreading, abaxially green, 3.5–7.5 mm; petals white to cream, often drying yellowish, cuneate to obcordate, (3.5–)4–8 × 2–8 mm, apex ± emarginate, sometimes rounded; filaments 1–3 × 0.5–1.5 mm, anthers 0.5–0.8 mm; carpels 5–15, styles 2–4 mm. <b>Achenes</b> dark brown, 2.4–3 mm, smooth to ± roughened.</span><!--

-->{{Treatment/Body
|distribution=Calif.;Oreg.
|discussion=<p>Varieties 3 (3 in the flora).</p><!--
--><p>D. D. Keck (1938) decided that the leaflet characters previously used to recognize segregates of <i>Horkelia daucifolia</i> were random variables that have not become localized into geographic subunits. At the same time, he established subsp. latior D. D. Keck to accommodate a single collection with leaves approaching those of <i>H. sericata</i>, with the speculation that the population was an amphiploid derivative of the two species. Subsequent collections from the same general area (Scott Mountain, Siskiyou County, California) provide a full range of variation between the extreme with exceptionally wide leaflet lobes and the typical form occurring at the base of the mountain. This variant of the species is accordingly not recognized here, but the extremes with narrower, more numerous leaflet lobes are recognized as varieties that coincide with major river drainages (B. Ertter and J. L. Reveal 2007).</p><!--
--><p>In the descriptions below, the pedicels of all varieties are sparsely pilose in addition to being puberulent or not.</p>
|tables=
|references=
}}<!--

--><div class="treatment-key">
==Key==
<div class="treatment-key-group">
  
{| class="wikitable fna-keytable"
|-id=key-0-1
|1
|Leaflet lobes 2–5(–8), linear to oblanceolate, 1–2(–3) mm wide; petals cuneate to obovate, 2–4 mm wide.
|[[Horkelia daucifolia var. daucifolia|Horkelia daucifolia var. daucifolia]]
|-id=key-0-1
|1
|Leaflet lobes (2–)5–15, linear, 0.4–1 mm wide; petals broadly obovate to obcordate, 4–8 mm wide
|[[#key-0-2| > 2]]
|-id=key-0-2
|2
|Pedicels 2–7(–10) mm, puberulent, eglandular; Oregon.
|[[Horkelia daucifolia var. caruifolia|Horkelia daucifolia var. caruifolia]]
|-id=key-0-2
|2
|Pedicels 5–10(–20) mm, not puberulent, minutely glandular; California.
|[[Horkelia daucifolia var. indicta|Horkelia daucifolia var. indicta]]
|}
</div></div><!--

-->{{#Taxon:
name=Horkelia daucifolia
|authority=(Greene) Rydberg
|rank=species
|parent rank=section
|synonyms=
|basionyms=Potentilla daucifolia
|family=Rosaceae
|distribution=Calif.;Oreg.
|reference=None
|publication title=Bull. Torrey Bot. Club
|publication year=1898
|special status=Endemic
|source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V9/V9_422.xml
|subfamily=Rosaceae subfam. Rosoideae
|tribe=Rosaceae tribe Potentilleae
|genus=Horkelia
|section=Horkelia sect. Tridentatae
|species=Horkelia daucifolia
}}<!--

-->

[[Category:Treatment]]
[[Category:Horkelia sect. Tridentatae]]
[[Category:Revised Since Print]]