Ivesia jaegeri
Jaeger's ivesia
(c) Stan Shebs, some rights reserved (CC BY-SA) · licence
Family: Rosaceae · Type: Herb · Native
Conservation status: CNPS 1B.3
Ivesia jaegeri (Jaeger's ivesia) is a native California herb in the Rosaceae family, recognized by yellow petals and 20 stamens diagnostic.
Jaeger's ivesia is a rare California native perennial ranked 1B.3 by CNPS, found in the eastern Desert Mountains, specifically the Clark Mountain Range, growing in limestone crevices at elevations of 1,890 to 2,300 meters. Flowering from June to July, this plant produces delicate yellow flowers 5 to 11 millimeters wide in open clusters of 3 to 15 blooms. Growing with green, branched stems 3 to 15 centimeters long that hang or form a mat-like structure, it has a distinctive growth habit that allows it to cling to rocky surfaces. Its leaves are complex, with 4 to 6 leaflet pairs on each side, each leaflet having 3 to 6 small oblanceolate to obovate lobes 2 to 5 millimeters long. The fruits are small, pale, and slightly ridged, measuring just 1 to 2 millimeters in length.
Identification and appearance
Key characters: 3 sympatric species; yellow petals and 20 stamens diagnostic
Habitat and range
Habitat: Limestone crevices
Elevation: 1890-2300 m
California counties: San Bernardino
Outside California: southwestern Nevada
Bloom period
Ivesia jaegeri blooms Jun-Jul.
Conservation status
CNPS 1B.3
How to tell it apart
vs Achillea: Ivesia has rose-like flowers with separate petals; Achillea has composite flower heads with ray and disk flowers.; vs Potentilla: Ivesia has cylindrical bottlebrush leaves with 4-80 tiny leaflets per side; Potentilla has flat leaves with spread-out leaflets.; vs Horkelia: Ivesia has cylindrical leaves with overlapping leaflets; Horkelia has flat leaves with 2-15 distinct, separated leaflets.; vs Eremogone: Ivesia has compound bottlebrush leaves; Eremogone has simple, needle-like or thread-like leaves.; vs Cryptantha: Ivesia has rose-family flowers with separate petals; Cryptantha has fused tubular corollas typical of borages.
Frequently asked questions
Is Ivesia jaegeri native to California?
Yes. Ivesia jaegeri is native to California (recorded as native).
When does Ivesia jaegeri bloom?
Ivesia jaegeri blooms Jun-Jul.
Where in California does Ivesia jaegeri grow?
Ivesia jaegeri occurs in San Bernardino, at elevations of 1890-2300 m.
What plant family does Ivesia jaegeri belong to?
Ivesia jaegeri is in the Rosaceae family, genus Ivesia.
Is Ivesia jaegeri rare or endangered?
Ivesia jaegeri carries California Rare Plant Rank 1B.3, state rank S1.
Related species
Other California species in the same genus, family, or bioregion.
Sources: Jepson eFlora · CNPS Rare Plant Inventory · Index of California Plant Names · CalPhotos · CDFW CNDDB
Last updated 2026-10-07
Data from The California Species Project — 14,000+ California species with verified data from CNPS, CDFW, USFWS, Cal-IPC, and more.