Geranium yeoi
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Family: Geraniaceae · Type: Herb
Geranium yeoi is a California herb in the Geraniaceae family, recognized by no sympatric species.
Geranium yeoi is a naturalized biennial found in open to shaded sites at elevations below 100 meters. Flowering from October to November, this plant produces rounded purple petals with yellow anthers in delicate blossoms. Growing with erect stems 35 to 100 centimeters tall and sparse hairs, it has distinctive deeply divided leaves with five segments, each pinnately lobed and dissected. Its leaf blades span 5.8 to 17.3 centimeters wide, with middle segments featuring up to 96 lobes in the distal half. The fruit develops mericarp segments 3.1 to 4 millimeters long with a narrow beak 21.2 to 27 millimeters in length.
Identification and appearance
Key characters: Geographically isolated; no sympatric species
Habitat and range
Habitat: Open to shaded sites
Elevation: < 100 m
Outside California: native to Atlantic island of Madeira, alien in France, Australia and New Zealand
Bloom period
Geranium yeoi blooms Oct-Nov.
How to tell it apart
vs Erodium: Geranium leaves are palmately divided like spread fingers; Erodium leaves are pinnately divided like a feather.; vs Pelargonium: Geranium is herbaceous with symmetrical flowers; Pelargonium is shrubby with asymmetrical flowers.; vs Sidalcea: Geranium has deeply palm-divided leaves; Sidalcea has shallowly palmately-lobed leaves and stamens fused in a column.; vs Bowlesia: Geranium has deeply divided leaves and pink flowers; Bowlesia has shallowly lobed leaves and tiny white umbel flowers.; vs Malva: Geranium has deeply palm-divided leaves with narrow segments; Malva has shallowly palmately-lobed leaves and fused stamens.
Frequently asked questions
When does Geranium yeoi bloom?
Geranium yeoi blooms Oct-Nov.
What plant family does Geranium yeoi belong to?
Geranium yeoi is in the Geraniaceae family, genus Geranium.
What habitat does Geranium yeoi grow in?
Geranium yeoi grows in Open to shaded sites.
Related species
Other California species in the same genus, family, or bioregion.
- Geranium aequale
- Geranium bicknellii — Bicknell's cranesbill
- Geranium californicum — California cranesbill
- Geranium carolinianum — Carolina geranium
- Geranium columbinum — Longstalk cranesbill
- Geranium core-core — Alderney crane's-bill
- Pelargonium capitatum — Rose scented geranium
- Pelargonium grossularioides — Gooseberry geranium
- Pelargonium ×hortorum — Fish geranium
- Pelargonium inquinans — Scarlet geranium
Sources: Jepson eFlora · Index of California Plant Names · CalPhotos
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.