Ivesia jaegeri |
Ivesia shockleyi |
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Jaeger's ivesia, Jaeger's mousetail |
Shockley's ivesia, sky mousetail |
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Habit | Plants green, ± tufted to ± matted, often forming hanging clumps, sometimes rosetted. | Plants green to grayish green, ± densely matted. | ||||
Stems | pendent or prostrate to ascending, 0.3–1.5 dm. |
prostrate to ascending, 0.2–1.5 dm. |
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Basal leaves | ± loosely cylindric to weakly planar, 2–8(–10) cm; sheathing base not or sparsely strigose abaxially; petiole 0.5–4 cm; lateral leaflets (1–)4–6(–8) per side, ± overlapping at least distally, ± flabellate, 2–6(–7) mm, incised nearly to base into 3–6 oblanceolate to narrowly obovate lobes, apex not or scarcely setose, surfaces ± sparsely short-pilose, ± glandular; terminal leaflets indistinct. |
tightly to loosely cylindric, (1–)2–12(–14) cm; sheathing base strigose to hirsute abaxially; petiole 0.5–4 cm; lateral leaflets (3–)5–15(–18) per side, separate to overlapping at least distally, ± flabellate, 1–4(–6) mm, incised to base or nearly so into 2–10(–12) oblanceolate to obovate or elliptic lobes, apex sometimes setose, surfaces ± sparsely hirsute, ± glandular; terminal leaflets indistinct. |
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Cauline leaves | (1–)2; blade well developed. |
(0–)1; blade vestigial or reduced. |
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Inflorescences | (1–)3–15-flowered, open, (0.5–)1.5–4(–7) cm diam. |
2–20-flowered, ± open, 0.5–4(–6) cm diam. |
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Pedicels | 5–30 mm. |
3–10(–12) mm. |
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Flowers | 5–11 mm diam.; epicalyx bractlets 5, lanceolate, 1–2 mm; hypanthium patelliform, 1 × 2–4 mm; sepals 2–3 mm, ± acute; petals yellow, narrowly oblanceolate, 1.5–2 mm; stamens 20, filaments 1–1.5(–1.8) mm, anthers yellow, subrotund, 0.2–0.3 mm; carpels 3–8, styles 1.5–2 mm. |
5–10 mm diam.; epicalyx bractlets 5, elliptic or narrowly oblong to ovate, 0.7–2(–3) mm; hypanthium patelliform, 1–2 × 2.5–4.5(–5) mm; sepals 1.5–3.5(–4) mm, acute to obtuse; petals ± yellow, oblanceolate to spatulate or narrowly obovate, 1–3 mm; stamens 5, filaments 0.8–1.8 mm, anthers yellow, oblong, 0.4–0.9 mm; carpels 2–5(–6), styles 1.8–2.5 mm. |
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Achenes | tan to light brown, 1–2 mm, ± rugose, ± carunculate. |
greenish cream to light brown, 1.5–2.2(–2.5) mm, smooth, prominently carunculate. |
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Ivesia jaegeri |
Ivesia shockleyi |
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Phenology | Flowering summer. | |||||
Habitat | Dry, rocky outcrops of limestone origin, usually crevices of more or less vertical protected cliffs or boulders, mainly in conifer woodlands | |||||
Elevation | 1600–3600 m (5200–11800 ft) | |||||
Distribution |
CA; NV |
CA; NV; OR; UT
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Discussion | Of conservation concern. Ivesia jaegeri is known only from the Spring Mountains, Clark County, Nevada, and the Clark Mountains, San Bernardino County, California. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Varieties 2 (2 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 9, p. 223. | FNA vol. 9, p. 227. | ||||
Parent taxa | ||||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | Potentilla jaegeri | Potentilla shockleyi | ||||
Name authority | Munz & I. M. Johnston: Bull. Torrey Bot. Club 56: 165. (1929) | S. Watson: Proc. Amer. Acad. Arts 23: 263. (1888) | ||||
Web links |