Difference between revisions of "Ivesia muirii"
Proc. Amer. Acad. Arts 8: 627. 1873.
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|name=Potentilla muirii | |name=Potentilla muirii | ||
|authority=(A. Gray) Greene | |authority=(A. Gray) Greene | ||
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|hierarchy=Rosaceae;Rosaceae subfam. Rosoideae;Rosaceae tribe Potentilleae;Ivesia;Ivesia sect. Ivesia;Ivesia muirii | |hierarchy=Rosaceae;Rosaceae subfam. Rosoideae;Rosaceae tribe Potentilleae;Ivesia;Ivesia sect. Ivesia;Ivesia muirii | ||
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name=Ivesia muirii | name=Ivesia muirii | ||
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|authority=A. Gray | |authority=A. Gray | ||
|rank=species | |rank=species | ||
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|publication year=1873 | |publication year=1873 | ||
|special status=Endemic | |special status=Endemic | ||
| − | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/ | + | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f50eec43f223ca0e34566be0b046453a0960e173/coarse_grained_fna_xml/V9/V9_363.xml |
|subfamily=Rosaceae subfam. Rosoideae | |subfamily=Rosaceae subfam. Rosoideae | ||
|tribe=Rosaceae tribe Potentilleae | |tribe=Rosaceae tribe Potentilleae | ||
Revision as of 22:40, 16 December 2019
Plants silvery, usually ± rosetted; taproot stout, sometimes fleshy. Stems usually ± erect, sometimes nearly prostrate, 0.5–1.5(–2) dm. Basal leaves very tightly cylindric (mousetail-like, with individual leaflets scarcely distinguishable), 2–5(–10) cm; sheathing base densely strigose abaxially; petiole 0.2–0.8(–1) cm, hairs 0.5–1.5 mm; leaflets 25–40 per side, 0.4–1 mm, densely sericeous, glands obscured, lobes 2–5, obovate or oval to orbiculate, apex not setose. Cauline leaves (0–)1–2, paired if 2. Inflorescences 10–30-flowered, 1–2(–3.5) cm diam.; glomerules usually 1. Pedicels 0.3–2(–3.5) mm. Flowers 5–6 mm diam.; epicalyx bractlets oblong to obovate, 0.5–1 mm; hypanthium shallowly cupulate, 0.5–1(–1.5) × 1.5–2.5 mm; sepals (1–)1.5–2.5 mm, acute; petals yellow, linear to oblanceolate or narrowly oblong, 1–2 mm; stamens 5, filaments 0.3–0.6 mm, anthers yellow, 0.4–0.6 mm; carpels 1–4, styles 0.7–1.2 mm. Achenes grayish brown, mottled with red, 1.6–2 mm.
Phenology: Flowering summer.
Habitat: Dry rocky slopes, fellfields, mostly in alpine conifer woodlands and tundra
Elevation: 2900–4000 m
Discussion
Ivesia muirii is known from alpine areas in the Sierra Nevada. It is one of the more distinctive species of the genus, in its silvery mousetail-like leaves and usually tightly capitate inflorescences. Putative hybrids are known with I. lycopodioides (D. D. Keck 1938) and I. pygmaea (Center Basin area of Tulare County).
Selected References
None.