Ivesia lycopodioides |
Ivesia multifoliolata |
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club-moss ivesia, clubmoss mousetail |
Coconino ivesia, manyleaf mousetail, red comarella |
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Habit | Plants green, usually rosetted, sometimes ± tufted; taproot fusiform, fleshy. | Plants green. | ||||||||
Stems | decumbent to erect, 0.3–3 dm. |
ascending to erect, 2–6 dm. |
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Basal leaves | tightly to loosely cylindric, 1–15 cm; sheathing base glabrous abaxially; petiole 0.5–4 cm, hairs 0.2–1 mm; leaflets 10–35 per side, 1–8 mm, glabrous or short-hirsute, minutely glandular, lobes (2–)4–8(–10), linear to obovate or ± orbiculate, apex sometimes setose. |
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. |
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Cauline leaves | 0–2(–3), not paired. |
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Inflorescences | 3–20(–25)-flowered, (0.5–)1–2.5(–3.5) cm diam.; glomerules usually 1. |
(5–)8–60-flowered, 2–12 cm diam. |
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Pedicels | (0.5–)1–7(–11) mm. |
5–30(–35) mm. |
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Flowers | 6–12 mm diam.; epicalyx bractlets oblong to oval, 0.8–2.5(–3) mm; hypanthium shallowly cupulate, 1–2 × 2.5–5 mm; sepals (1.8–)2–4(–4.5) mm, obtuse to acute; petals golden yellow, obovate, 2–5 mm; stamens 5, filaments 0.8–2 mm, anthers yellow, 0.6–0.8 mm; carpels (5–)8–15(–18), styles 1–3 mm. |
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. |
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Achenes | greenish tan to light brown, 1.2–1.5 mm. |
brown, 2–2.5 mm. |
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2n | = 28. |
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Ivesia lycopodioides |
Ivesia multifoliolata |
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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 |
CA; NV
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AZ |
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Discussion | Varieties 3 (3 in the flora). The three varieties of Ivesia lycopodioides are for the most part readily distinguished, though intergradation is known. The high-elevation var. lycopodioides extends farthest north; var. scandularis is the only variety in the White Mountains. Variety megalopetala is found mostly at somewhat lower (subalpine) elevations and generally has a more southern range. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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.) |
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Key |
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Source | FNA vol. 9, p. 232. | FNA vol. 9, p. 244. | ||||||||
Parent taxa | Rosaceae > subfam. Rosoideae > tribe Potentilleae > Ivesia > sect. Ivesia | Rosaceae > subfam. Rosoideae > tribe Potentilleae > Ivesia > sect. Comarella | ||||||||
Sibling taxa | ||||||||||
Subordinate taxa | ||||||||||
Synonyms | Potentilla lycopodioides | Horkelia multifoliolata, Comarella multifoliolata, Potentilla multifoliolata | ||||||||
Name authority | A. Gray: Proc. Amer. Acad. Arts 6: 530. (1865) | (Torrey) D. D. Keck: Lloydia 1: 125. (1939) | ||||||||
Web links |