bur clover

Medicago polymorpha

Member of shamrock medicks (section Spirocarpos)
medicks (genus Medicago)
small yellow peas
legume family (family Fabaceae)
dicots (class Magnoliopsida)
yellow in flowering plants

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• generally glabrous
• stem prostrate, mat-forming, or ascending
• leaflet without dark central spot, length 1–2 × width
• stipules generally cut ± ≥ ½ width
• corolla 3.5–6 mm, yellow
• very common
• see also chile trefoil (Acmispon wrangelianus), which has generally 4 leaflets instead of 3

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Chris’s observations: 24 (18 are research grade)

Locations:

• Henry Coe SP: 6
• Almaden Quicksilver CP: 4
• Edgewood Park & Natural Preserve: 4
• Russian Ridge OSP: 3
• Calero CP: 2
• Coyote Lake / Harvey Bear Ranch CP: 2
• Fremont Older OSP
• Sunol Wilderness RP
• Sweeney Ridge National Recreation Area

Months:

• Feb.: 1
• Mar.: 9
• Apr.: 11
• May: 3

For more details, use advanced search.

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Not all sites include this taxon:

• Medicago polymorpha → iNaturalist – Calflora – CalPhotos – Jepson eFlora
• not yet listed → FNA

Bay Area species: iNaturalist – Calflora