Ivesia setosa
Ivesia callida
bristly ivesia
Tahquitz ivesia, Tahquitz mousetail
± ascending to nearly erect, 0.7–2.5(–2.8) dm.
usually pendent or prostrate to ascending, sometimes nearly erect, 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.
± loosely cylindric to weakly planar, 1–7 cm; sheathing base sparsely strigose abaxially;
petiole 0.3–3 cm;
lateral leaflets (1–)5–8 per side, slightly overlapping, elliptic to flabellate, 2–6(–7) mm, incised nearly to base into (0–)2–4 oblanceolate to elliptic lobes, apex sometimes ± setose, surfaces loosely long-strigose, sparsely glandular;
terminal leaflets indistinct.
(0–)1;
blade vestigial.
(1–)2;
blade reduced.
(1–)5–15(–30)-flowered, ± open, 1–6(–12) cm diam.
1–10(–15)-flowered, open, (0.5–)2–5 cm diam.
5–15(–20) mm.
5–15 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.
7–10 mm diam.;
epicalyx bractlets 5, narrowly lanceolate, 1.5–3 mm;
hypanthium patelliform, 0.5–1 × 2–3 mm;
sepals 2–3.5 mm, acute;
petals white, obovate, 2–3.5 mm;
stamens 20, filaments 1.5–3 mm, anthers maroon, subrotund, 0.2–0.3 mm;
carpels 4–8, styles 1.5–1.8 mm.
greenish white to light tan, 1.7–2 mm, smooth, ± carunculate.
greenish white to light tan, 1.5 mm, smooth to lightly rugose, ± carunculate.
Ivesia setosa
Ivesia callida
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.)
Of conservation concern.
Ivesia callida occurs in the Tahquitz Peak area of the San Jacinto Wilderness Area, San Jacinto Mountains, Riverside County, where two populations are known (K. Berg 1983). Plants form tight mats in horizontal crevices and loose pendent clumps on vertical rock faces.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
CalFlora
WildflowerSearch
iNaturalist
USDA Plants Database
