Difference between revisions of "Horkelia tenuiloba"
Proc. Amer. Acad. Arts 6: 529. 1865.
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|label=Endemic | |label=Endemic | ||
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| − | |basionyms={{Treatment/ID/ | + | |basionyms={{Treatment/ID/Basionym |
|name=Horkelia fusca var. tenuiloba | |name=Horkelia fusca var. tenuiloba | ||
|authority=Torrey | |authority=Torrey | ||
| + | |rank=variety | ||
| + | |publication_title=in War Department [U.S.], Pacif. Railr. Rep. | ||
| + | |publication_place=4(5): 84. 1857 | ||
}} | }} | ||
|synonyms={{Treatment/ID/Synonym | |synonyms={{Treatment/ID/Synonym | ||
|name=Potentilla micheneri | |name=Potentilla micheneri | ||
|authority=Greene | |authority=Greene | ||
| − | }}{{Treatment/ID/Synonym | + | |rank=species |
| + | }} {{Treatment/ID/Synonym | ||
|name=P. stenoloba | |name=P. stenoloba | ||
|authority=Greene | |authority=Greene | ||
| + | |rank=species | ||
}} | }} | ||
|hierarchy=Rosaceae;Rosaceae subfam. Rosoideae;Rosaceae tribe Potentilleae;Horkelia;Horkelia sect. Horkelia;Horkelia tenuiloba | |hierarchy=Rosaceae;Rosaceae subfam. Rosoideae;Rosaceae tribe Potentilleae;Horkelia;Horkelia sect. Horkelia;Horkelia tenuiloba | ||
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|distribution=Calif. | |distribution=Calif. | ||
|discussion=<p>Of conservation concern.</p><!-- | |discussion=<p>Of conservation concern.</p><!-- | ||
| − | --><p>Horkelia tenuiloba occurs on the western edges of the northern Coast Ranges in Marin, Mendocino, and Sonoma counties. Populations from San Luis Obispo formerly included in this species now are part of H. yadonii. A specimen (M. K. C[urran], July 5, 1885, UC) unequivocally of H. tenuiloba purportedly from San Luis Obispo is in all likelihood mislabeled with respect to locality.</p><!-- | + | --><p><i>Horkelia tenuiloba</i> occurs on the western edges of the northern Coast Ranges in Marin, Mendocino, and Sonoma counties. Populations from San Luis Obispo formerly included in this species now are part of <i>H. yadonii</i>. A specimen (M. K. C[urran], July 5, 1885, UC) unequivocally of <i>H. tenuiloba</i> purportedly from San Luis Obispo is in all likelihood mislabeled with respect to locality.</p><!-- |
| − | --><p>Horkelia tenuiloba is commonly associated with seral openings in chaparral and woodlands and might be dependent on periodic disturbance by fire.</p><!-- | + | --><p><i>Horkelia tenuiloba</i> is commonly associated with seral openings in chaparral and woodlands and might be dependent on periodic disturbance by fire.</p><!-- |
| − | --><p>W. L. Jepson (1909–1943, vol. 2) used Potentilla stenoloba (1895) for the species encompassing the types of Horkelia tenuiloba and P. micheneri. The epithet micheneri (1893) has priority at species rank within Potentilla, since P. tenuiloba (Torrey) Greene is a later homonym of P. tenuiloba Jordan.</p> | + | --><p>W. L. Jepson (1909–1943, vol. 2) used <i>Potentilla</i> stenoloba (1895) for the species encompassing the types of <i>Horkelia tenuiloba</i> and P. micheneri. The epithet micheneri (1893) has priority at species rank within <i>Potentilla</i>, since <i>P. tenuiloba</i> (Torrey) Greene is a later homonym of <i>P. tenuiloba</i> Jordan.</p> |
|tables= | |tables= | ||
|references= | |references= | ||
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-->{{#Taxon: | -->{{#Taxon: | ||
name=Horkelia tenuiloba | name=Horkelia tenuiloba | ||
| − | |||
|authority=(Torrey) A. Gray | |authority=(Torrey) A. Gray | ||
|rank=species | |rank=species | ||
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|publication year=1865 | |publication year=1865 | ||
|special status=Conservation concern;Endemic | |special status=Conservation concern;Endemic | ||
| − | |source xml=https:// | + | |source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V9/V9_393.xml |
|subfamily=Rosaceae subfam. Rosoideae | |subfamily=Rosaceae subfam. Rosoideae | ||
|tribe=Rosaceae tribe Potentilleae | |tribe=Rosaceae tribe Potentilleae | ||
Latest revision as of 22:56, 5 November 2020
Plants loosely matted, green. Stems ascending to erect, 1–4 dm, hairs ± spreading. Basal leaves weakly planar to ± cylindric, 5–15(–20) × 0.5–1.5 cm; stipules entire; leaflets 8–16(–20) per side, ± overlapping especially distally, cuneate to flabellate, 3–10 × 2–10 mm, 1/2 to nearly as wide as long, divided 1/2–3/4+ to midrib into 3–8 linear to narrowly oblanceolate or narrowly elliptic lobes, sparsely villous at least marginally, often with a tuft of hairs apically. Cauline leaves 2–5. Inflorescences open to congested, flowers arranged individually and in glomerules, these sometimes subcapitate. Pedicels 1–6 mm. Flowers 10 mm diam.; epicalyx bractlets narrowly to broadly lanceolate, 1–3 × 0.5–1 mm, slightly shorter than sepals, entire; hypanthium 1–1.2 × 2.5–4.5 mm, less than 1/2 as deep as wide, interior pilose; sepals spreading to reflexed, lanceolate, 3–5 mm; petals oblanceolate, 2.5–4.5 × 1.5 mm, apex emarginate; filaments (1–)1.5–2 × 0.5 mm, anthers 0.4–0.6 mm; carpels 10–25; styles 1.8–2.2 mm. Achenes light brown, 1.5 mm, smooth or slightly rugose. 2n = 28.
Phenology: Flowering summer.
Habitat: Sandy soil, openings, in chaparral, oak woodlands
Elevation: 50–500 m
Discussion
Of conservation concern.
Horkelia tenuiloba occurs on the western edges of the northern Coast Ranges in Marin, Mendocino, and Sonoma counties. Populations from San Luis Obispo formerly included in this species now are part of H. yadonii. A specimen (M. K. C[urran], July 5, 1885, UC) unequivocally of H. tenuiloba purportedly from San Luis Obispo is in all likelihood mislabeled with respect to locality.
Horkelia tenuiloba is commonly associated with seral openings in chaparral and woodlands and might be dependent on periodic disturbance by fire.
W. L. Jepson (1909–1943, vol. 2) used Potentilla stenoloba (1895) for the species encompassing the types of Horkelia tenuiloba and P. micheneri. The epithet micheneri (1893) has priority at species rank within Potentilla, since P. tenuiloba (Torrey) Greene is a later homonym of P. tenuiloba Jordan.
Selected References
None.