Ivesia patellifera |
Ivesia cryptocaulis |
|
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Kingston Mountain mousetail, Kingston Mountains. ivesia |
Charleston Peak ivesia, Charleston Peak mousetail |
|
Habit | Plants green, ± tufted, often forming hanging clumps, sometimes rosetted. | Plants green, diffusely matted. |
Stems | pendent or prostrate to ascending, (0.5–)1–2 dm. |
prostrate to decumbent, 0.2–0.6(–1) dm. |
Basal leaves | 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. |
tightly cylindric, 1–4(–5) cm; sheathing base mostly not strigose abaxially; petiole 0.3–2 cm, hairs 0.5–1 mm; lateral leaflets 5–10(–12) per side, ± overlapping, ± flabellate, 1–2.5 mm, incised to base or nearly so into 3–5 obovate to oval lobes, apex sometimes ± setose, surfaces loosely long-strigose, sparsely glandular; terminal leaflets indistinct. |
Cauline leaves | (0–)2; blade well developed. |
1(–2); blade vestigial. |
Inflorescences | (1–)3–20(–35)-flowered, open, (0.5–)1.5–4(–6) cm diam. |
1–10-flowered, ± congested, 0.5–1.5 cm diam. |
Pedicels | 5–20(–30) mm. |
3–7(–10) mm. |
Flowers | 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. |
6–9 mm diam.; epicalyx bractlets 5, lanceolate to narrowly oblong or narrowly ovate, 0.8–1.3 mm; hypanthium shallowly cupulate, ± 1 × 2–3(–4) mm; sepals 1.5–2.3 mm, ± acute; petals yellow, oblanceolate to spatulate, 2–3.2 mm; stamens 5, filaments 0.9–1.2 mm, anthers yellow, oblong, 0.7–0.9 mm; carpels 6–10, styles 1–1.5 mm. |
Achenes | greenish white to light tan, 1.5–2 mm, faintly rugose, ± carunculate. |
greenish cream to light brown, 1.4–1.8(–2) mm, smooth, not carunculate. |
Ivesia patellifera |
Ivesia cryptocaulis |
|
Phenology | Flowering summer. | Flowering summer. |
Habitat | Dry, rocky outcrops of limestone, usually crevices of more or less vertical protected cliffs or boulders, in conifer woodlands | Dry to moist limestone gravel, scree, or talus slopes and outcrops, subalpine conifer woodlands, alpine tundra communities |
Elevation | 1400–2200 m (4600–7200 ft) | 2500–3700 m (8200–12100 ft) |
Distribution |
CA |
NV |
Discussion | 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.) |
Of conservation concern. Ivesia cryptocaulis is known only from timberline and above in the Spring Mountains of Clark County. Plants differ from all others of the genus by having slender, elongate, diffuse caudex branches that ramify through its habitat of gravel, scree, and talus. The species is here provisionally included in sect. Setosae as a diffusely matted relative of I. shockleyi (as also suggested by D. D. Keck 1938); the ecarunculate seeds and relatively straight pedicels may indicate a greater similarity to I. pygmaea in sect. Ivesia. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 9, p. 224. | FNA vol. 9, p. 228. |
Parent taxa | ||
Sibling taxa | ||
Synonyms | Potentilla patellifera | Potentilla cryptocaulis |
Name authority | (J. T. Howell) Ertter: Syst. Bot. 14: 232. (1989) | (Clokey) D. D. Keck: Lloydia 1: 130. (1939) |
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