Ivesia patellifera |
Ivesia longibracteata |
|
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Kingston Mountain mousetail, Kingston Mountains. ivesia |
Castle Crags ivesia, longbract mousetail |
|
Habit | Plants green, ± tufted, often forming hanging clumps, sometimes rosetted. | Plants green, ± tufted; taproot ± stout, not fleshy. |
Stems | pendent or prostrate to ascending, (0.5–)1–2 dm. |
ascending to erect, 0.3–1.2 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. |
weakly planar to loosely ± cylindric, (0.5–)2–4(–6) cm; sheathing base glandular abaxially, otherwise glabrous; petiole 0.5–2 cm, hairs 0.2–1 mm; leaflets 5–6 per side, 2–6 mm, ± short-hirsute, glandular-puberulent, lobes 2–7, oblanceolate to spatulate or obovate, apex not setose. |
Cauline leaves | (0–)2; blade well developed. |
1–3, not paired. |
Inflorescences | (1–)3–20(–35)-flowered, open, (0.5–)1.5–4(–6) cm diam. |
3–14-flowered, 1–2.5 cm diam.; glomerules 1. |
Pedicels | 5–20(–30) mm. |
1.5–6 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. |
8–10 mm diam.; epicalyx bractlets linear to narrowly lanceolate or elliptic, 2.5–5 mm, longer than sepals; hypanthium shallowly cupulate, 0.5–1 × 2–3 mm; sepals 1.5–2.5 mm, ± acute; petals pale yellow, linear to narrowly oblanceolate, 1.5–2.5 mm; stamens 5, filaments 0.7–1.3 mm, anthers yellow, 0.5–0.8 mm; carpels 6–11, styles 1–1.5 mm. |
Achenes | greenish white to light tan, 1.5–2 mm, faintly rugose, ± carunculate. |
cream to light tan, 1.2–1.5 mm. |
Ivesia patellifera |
Ivesia longibracteata |
|
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 crevices of granodioritic igneous rock, in mixed oak-conifer woodlands |
Elevation | 1400–2200 m (4600–7200 ft) | 1200–1400 m (3900–4600 ft) |
Distribution |
CA |
CA |
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 longibracteata is known only from the Castle Crags area of Shasta County. The epithet alludes to a diagnostic characteristic unique in the genus: the epicalyx bractlets are longer than the sepals. The plants grow on vertical rock faces, a habitat more characteristic of sect. Setosae; however, the stems are ascending to erect and do not form hanging clumps, and the pedicels are not curved in fruit. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 9, p. 224. | FNA vol. 9, p. 236. |
Parent taxa | ||
Sibling taxa | ||
Synonyms | Potentilla patellifera | |
Name authority | (J. T. Howell) Ertter: Syst. Bot. 14: 232. (1989) | Ertter: Syst. Bot. 14: 233, fig. 1. (1989) |
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