Ivesia setosa
Ivesia shockleyi
bristly ivesia
Shockley's ivesia, sky mousetail
± ascending to nearly erect, 0.7–2.5(–2.8) dm.
prostrate to ascending, 0.2–1.5 dm.
weakly planar to loosely cylindric, 5–9(–12) cm; sheathing base ± strigose abaxially;
petiole 1–8 cm;
lateral leaflets 5–10 per side, separate to overlapping distally, ± flabellate, 2–8 mm, incised ± 3/4 to base, sometimes nearly to base, into (3–)7–11 ovate teeth to narrowly obovate lobes, apex usually ± setose, surfaces ± sparsely hirsute, conspicuously glandular;
terminal leaflets ± indistinct.
tightly to loosely cylindric, (1–)2–12(–14) cm; sheathing base strigose to hirsute abaxially;
petiole 0.5–4 cm;
lateral leaflets (3–)5–15(–18) per side, separate to overlapping at least distally, ± flabellate, 1–4(–6) mm, incised to base or nearly so into 2–10(–12) oblanceolate to obovate or elliptic lobes, apex sometimes setose, surfaces ± sparsely hirsute, ± glandular;
terminal leaflets indistinct.
(0–)1;
blade vestigial.
(0–)1;
blade vestigial or reduced.
(1–)5–15(–30)-flowered, ± open, 1–6(–12) cm diam.
2–20-flowered, ± open, 0.5–4(–6) cm diam.
5–15(–20) mm.
3–10(–12) mm.
7–10 mm diam.;
epicalyx bractlets 5, lanceolate, 1.3–2.5(–3) mm;
hypanthium patelliform, (1–)1.5–2 × 2–3.5(–4) mm;
sepals (1.5–)2–3.5 mm, ± acute;
petals yellow, oblanceolate to narrowly spatulate, 1.5–2.5 mm;
stamens 5, filaments 0.8–1.5 mm, anthers yellow, oblong, 0.4–0.7 mm;
carpels 2–8, styles 1.2–2 mm.
5–10 mm diam.;
epicalyx bractlets 5, elliptic or narrowly oblong to ovate, 0.7–2(–3) mm;
hypanthium patelliform, 1–2 × 2.5–4.5(–5) mm;
sepals 1.5–3.5(–4) mm, acute to obtuse;
petals ± yellow, oblanceolate to spatulate or narrowly obovate, 1–3 mm;
stamens 5, filaments 0.8–1.8 mm, anthers yellow, oblong, 0.4–0.9 mm;
carpels 2–5(–6), styles 1.8–2.5 mm.
greenish white to light tan, 1.7–2 mm, smooth, ± carunculate.
greenish cream to light brown, 1.5–2.2(–2.5) mm, smooth, prominently carunculate.
Ivesia setosa
Ivesia shockleyi
Ivesia setosa occurs mostly to the east and south of I. baileyi, from southeastern Humboldt and Churchill counties to Elko, White Pine, and northern Nye counties, Nevada, and in the Deep Creek Range of western Utah. It represents a transition between the planar-leaved, chasmophytic members of sect. Setosae and the cylindric-leaved, matted species of flatter sites. Stems of I. setosa are more generally erect than in other species in the section, and the usually calcareous substrate is noteworthy. The deeply incised (usually not quite to base) leaflets are somewhat intermediate between the toothed leaflets of I. baileyi and the leaflets of I. shockleyi that are incised to the base into separate lobes. The individual leaflets of both I. baileyi and I. setosa are more or less flat and distichously paired; in I. shockleyi, groups of leaflet lobes are folded over onto each other, giving a verticillate appearance to the leaflet arrangement.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Varieties 2 (2 in the flora).
(Discussion copyrighted by Flora of North America; reprinted with permission.)
1. Lateral leaflets: lobes 2–5(–7); inflorescences 2–10-flowered, 0.5–3 cm diam.; e California, c, se Oregon, c, n Nevada. | var. shockleyi |
1. Lateral leaflets: lobes (4–)6–10(–12); inflorescences 5–20-flowered, (1–)3–4(–6) cm diam.; wc Utah. | var. ostleri |
CalFlora
WildflowerSearch
iNaturalist
USDA Plants Database
OR
Flora NW
PNW Herbaria
