Ivesia lycopodioides |
Ivesia patellifera |
|||||||||
---|---|---|---|---|---|---|---|---|---|---|
club-moss ivesia, clubmoss mousetail |
Kingston Mountain mousetail, Kingston Mountains. ivesia |
|||||||||
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–)1–2 dm. |
||||||||
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, (2–)5–15 cm; sheathing base not strigose abaxially; petiole 1–5 cm; lateral leaflets (1–)2–3(–4) per side, separate, obovate to orbiculate, 5–20 mm, incised 1/4–1/2 to base into 5–9 broadly ovate teeth, apex not setose, surfaces short-pilose, ± glandular; terminal leaflets distinct. |
||||||||
Cauline leaves | 0–2(–3), not paired. |
(0–)2; blade well developed. |
||||||||
Inflorescences | 3–20(–25)-flowered, (0.5–)1–2.5(–3.5) cm diam.; glomerules usually 1. |
(1–)3–20(–35)-flowered, open, (0.5–)1.5–4(–6) cm diam. |
||||||||
Pedicels | (0.5–)1–7(–11) mm. |
5–20(–30) mm. |
||||||||
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. |
7–10 cm diam.; epicalyx bractlets 0; hypanthium patelliform, 0.5(–1) × 2–3 mm; sepals 2–4 mm, broadly acute; petals yellow, narrowly oblanceolate, 2–3 mm; stamens 5–10, filaments 0.6–1.2(–1.5) mm, anthers yellow, oblong, 0.8–1 mm; carpels 4–10, styles 1.5–2 mm. |
||||||||
Achenes | greenish tan to light brown, 1.2–1.5 mm. |
greenish white to light tan, 1.5–2 mm, faintly rugose, ± carunculate. |
||||||||
Ivesia lycopodioides |
Ivesia patellifera |
|||||||||
Phenology | Flowering summer. | |||||||||
Habitat | Dry, rocky outcrops of limestone, usually crevices of more or less vertical protected cliffs or boulders, in conifer woodlands | |||||||||
Elevation | 1400–2200 m (4600–7200 ft) | |||||||||
Distribution |
CA; NV
|
CA |
||||||||
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 patellifera is confined to crevices in steep wash and canyon walls in the Kingston Mountains of San Bernardino County. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
||||||||
Key |
|
|||||||||
Source | FNA vol. 9, p. 232. | FNA vol. 9, p. 224. | ||||||||
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 patellifera | ||||||||
Name authority | A. Gray: Proc. Amer. Acad. Arts 6: 530. (1865) | (J. T. Howell) Ertter: Syst. Bot. 14: 232. (1989) | ||||||||
Web links |