Ivesia multifoliolata |
Ivesia baileyi |
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Coconino ivesia, manyleaf mousetail, red comarella |
Bailey's ivesia, Owyhee ivesia |
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Habit | Plants green. | Plants green, ± tufted, often forming hanging clumps, sometimes rosetted. | ||||
Stems | ascending to erect, 2–6 dm. |
pendent or prostrate to ascending, 0.5–2(–2.5) dm. |
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Basal leaves | 6–25(–30) cm; sheathing base minutely glandular abaxially; petiole 0.5–8(–10) cm; leaflets 12–30 per side, obovate to broadly cuneate, 5–12(–15) mm, incised 1/3–1/2 to base into 3–5 oblong to ovate teeth, sometimes entire, sparsely short-strigose to -villous, sometimes glabrate. |
planar, 3–12(–18) cm; sheathing base not or sparsely strigose abaxially; petiole 1–8 cm; lateral leaflets 2–6(–10) per side, separate to slightly overlapping distally, ovate or obovate to flabellate, 4–15(–25) mm, incised 1/4–3/4 to base into 3–11(–15) ovate to oblanceolate teeth or lobes, apex not setose, surfaces ± sparsely short-pilose or hirsute, ± glandular; terminal leaflets ± distinct. |
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Cauline leaves | 1–2; blade reduced. |
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Inflorescences | (5–)8–60-flowered, 2–12 cm diam. |
(1–)5–40-flowered, open, (1–)1.5–8(–10) cm diam. |
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Pedicels | 5–30(–35) mm. |
2–15(–30) mm. |
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Flowers | 9–12 mm diam.; epicalyx bractlets narrowly lanceolate to lanceolate, 1–2 mm; hypanthium interior brick- to blood-red or golden, 0.5–1.5 × 3–5 mm; sepals 3–4.5 mm, base brick- to blood-red adaxially, apex acute to acuminate; petals brick- to blood-red, linear to oblanceolate or narrowly elliptic, 2–3.5 mm; stamens 5, filaments 1.3–2 mm, anthers maroon, oblong, 0.6–0.9 mm; carpels 1–5, styles 2–3 mm. |
4–10 mm diam.; epicalyx bractlets 5, narrowly lanceolate to ovate, 0.8–2.5 mm; hypanthium patelliform, 0.5–2 × 2–4 mm; sepals (1.2–)1.5–4 mm, acute; petals white or pale yellow, oblanceolate to narrowly spatulate, 1.5–2.5 mm; stamens 5, filaments 0.5–1.1 mm, anthers yellow, sometimes with reddish margins, oblong, 0.4–0.7 mm; carpels (1–)3–8, styles 0.9–1.8 mm. |
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Achenes | brown, 2–2.5 mm. |
greenish white to light tan, 1.5–2 mm, smooth or rugose, ± carunculate. |
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2n | = 28. |
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Ivesia multifoliolata |
Ivesia baileyi |
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Phenology | Flowering summer. | |||||
Habitat | Dry flats and slopes, on gravelly volcanic or sandstone soil, often along seasonal stream courses, in oak and conifer woodlands | |||||
Elevation | 1800–2400 m (5900–7900 ft) | |||||
Distribution |
AZ |
CA; ID; NV; OR
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Discussion | Of conservation concern. Ivesia multifoliolata is found between the Grand Canyon and Mogollon Rim in northern Arizona. It is both the only species of the genus with red petals and the only one that overlaps the range of the red-petaled Potentilla sect. Rubrae. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Varieties 2 (2 in the flora). The two varieties accepted here were not recognized by D. D. Keck (1938), who instead treated Ivesia setosa as a variety of I. baileyi. Field investigations confirm that the three entities are reasonably distinct morphologically, with intergradation where their otherwise distinct ranges overlap in central Nevada. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 9, p. 244. | FNA vol. 9, p. 226. | ||||
Parent taxa | ||||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | Horkelia multifoliolata, Comarella multifoliolata, Potentilla multifoliolata | Potentilla baileyi | ||||
Name authority | (Torrey) D. D. Keck: Lloydia 1: 125. (1939) | S. Watson: Botany (Fortieth Parallel), 90. (1871) | ||||
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