Ivesia lycopodioides |
Ivesia baileyi |
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club-moss ivesia, clubmoss mousetail |
Bailey's ivesia, Owyhee ivesia |
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Habit | Plants green, usually rosetted, sometimes ± tufted; taproot fusiform, fleshy. | Plants green, ± tufted, often forming hanging clumps, sometimes rosetted. | ||||||||||||
Stems | decumbent to erect, 0.3–3 dm. |
pendent or prostrate to ascending, 0.5–2(–2.5) 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. |
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 | 0–2(–3), not paired. |
1–2; blade reduced. |
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Inflorescences | 3–20(–25)-flowered, (0.5–)1–2.5(–3.5) cm diam.; glomerules usually 1. |
(1–)5–40-flowered, open, (1–)1.5–8(–10) cm diam. |
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Pedicels | (0.5–)1–7(–11) mm. |
2–15(–30) 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. |
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 | greenish tan to light brown, 1.2–1.5 mm. |
greenish white to light tan, 1.5–2 mm, smooth or rugose, ± carunculate. |
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Ivesia lycopodioides |
Ivesia baileyi |
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Distribution |
CA; NV
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CA; ID; NV; OR
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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.) |
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. 232. | FNA vol. 9, p. 226. | ||||||||||||
Parent taxa | Rosaceae > subfam. Rosoideae > tribe Potentilleae > Ivesia > sect. Ivesia | Rosaceae > subfam. Rosoideae > tribe Potentilleae > Ivesia > sect. Setosae | ||||||||||||
Sibling taxa | ||||||||||||||
Subordinate taxa | ||||||||||||||
Synonyms | Potentilla lycopodioides | Potentilla baileyi | ||||||||||||
Name authority | A. Gray: Proc. Amer. Acad. Arts 6: 530. (1865) | S. Watson: Botany (Fortieth Parallel), 90. (1871) | ||||||||||||
Web links |