Ivesia sabulosa
Ivesia campestris
intermountain ivesia, intermountain mousetail, Sevier ivesia, yellow comarella
field ivesia, field mousetail, Kaweah ivesia
ascending to erect, (1.8–)2–6(–6.5) dm.
decumbent to ascending, 1–3.5 dm.
7–25(–30) cm; sheathing base usually sparsely strigose abaxially;
petiole 1–4(–5) cm;
leaflets 15–40 per side, ± flabellate, 3–14 mm, usually incised to base into 2–3 oblanceolate lobes, ± densely short-hirsute to -villous.
(3–)5–15(–18) cm; sheathing base glabrous or sparsely strigose abaxially;
stipules ± lanceolate, 2.5–5 mm;
petiole (0.3–)0.5–6(–8) cm, hairs sparse to abundant, appressed-ascending, 1–2 mm;
leaflets 15–20 per side, loosely overlapping, 2–10 mm, lobes 2–5, oblanceolate, hairs sparse to abundant, spreading to ascending, 1–2 mm.
3–4.
10–60-flowered, 4–15 cm diam.
5–20(–40)-flowered, (1–)1.5–2.5(–4) cm diam., flowers arranged in 1–few ± tight glomerules of 10–15 flowers.
(1–)5–20 mm.
1–4 mm.
9–14 mm diam.;
epicalyx bractlets lanceolate, 1–3(–3.3) mm;
hypanthium interior golden, 1–2 × 3–5 mm;
sepals (2.5–)3.5–6 mm, base golden adaxially, apex acute to acuminate;
petals yellow, linear to narrowly oblanceolate, 2–4 mm;
stamens 5, filaments 2–4 mm, anthers yellow, sometimes red-rimmed, oblong, 0.6–1.2 mm;
carpels 1–5, styles 2–3 mm.
7–10 mm diam.;
epicalyx bractlets linear to oblong, 1–2(–2.5) mm;
hypanthium campanulate, 1–2 × 2.5–4 mm, ± 1/2 as deep as wide;
sepals green, 2–3(–3.5) mm, acute;
petals 4(–5), light yellow, oblanceolate to spatulate or narrowly obovate, 3–4 mm;
stamens 12–16 (4-merous flowers) or 16–20 (5-merous flowers), filaments filiform, 0.6–1.1 mm, anthers yellowish, 0.3–0.5 mm;
carpels 4–20, styles 1.4–2 mm.
brown, 1.7–2.2 mm.
light brown, 1–1.5 mm.
Ivesia sabulosa
Ivesia campestris
Of conservation concern.
Ivesia sabulosa occurs from central Nevada and southwestern Utah south to Arizona north of the Grand Canyon.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Ivesia campestris is found in the southern Sierra Nevada south of the Kings River, where it replaces I. unguiculata and often occurs at higher elevations.
Ivesia campestris is the only member of the genus that commonly has 4-merous flowers. It is sometimes misidentified as I. unguiculata, especially when the pale yellow petals have faded to creamy white; the glomerules of the inflorescences tend to be yellowish green to green rather than purplish. Also, the anthers of I. campestris are yellowish, rather than maroon.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
CalFlora
WildflowerSearch
iNaturalist
USDA Plants Database
