Ivesia shockleyi var. shockleyi
Ivesia shockleyi
Shockley's ivesia, sky mousetail
Shockley's ivesia, sky mousetail
0.2–0.7(–1.1) dm.
prostrate to ascending, 0.2–1.5 dm.
(1–)2–8(–10) cm;
lateral leaflets (3–)5–10 per side, lobes 2–5(–7), oblanceolate to obovate.
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.
0.3–1 cm, blade vestigial, leaflets usually 0.
(0–)1;
blade vestigial or reduced.
2–10-flowered, 0.5–3 cm diam.
2–20-flowered, ± open, 0.5–4(–6) cm diam.
3–10(–12) 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 cream to light brown, 1.5–2.2(–2.5) mm, smooth, prominently carunculate.
Ivesia shockleyi var. shockleyi
Ivesia shockleyi
Of conservation concern.
Variety shockleyi occurs mainly on rocky slopes and talus near and above timberline from the crest of the northern and central Sierra Nevada in California and adjacent Nevada, to Lake and Malheur counties, Oregon, and on scattered sky islands as far as the Toquima Range (Nye County) and Jarbidge Mountains (Elko County) of Nevada. These isolated populations have developed variation that merits further analysis: plants from the northern Intermountain Region tend to have flowers and leaflets larger than those in the Sierra Nevada; central Nevada populations approach var. ostleri in leaflet number and inflorescence size. The Malheur County plants are unusual in occurring on canyon rimrock (West Little Owyhee River) 1000 m lower than any other known population, near I. baileyi var. beneolens on adjacent canyon walls.
(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 |
CA
OR
Flora NW
PNW Herbaria
WildflowerSearch
iNaturalist
USDA Plants Database
