hop trefoil

Trifolium campestre

Member of clovers (genus Trifolium)
legume family (family Fabaceae)
dicots (class Magnoliopsida)
yellow in flowering plants

Leaflets: 3, pinnate, petioles of mid-leaves > leaflets
Inflorescence: head-like, 8–13 mm wide, ovate to spheric, generally > 20-flowered; flowers quickly reflexed
Corolla: 4–5.5 mm, bright yellow, brown in age, striate

Chris’s observations: 17 (all are research grade)

Locations:

Edgewood County Park & Natural Preserve: 8
Russian Ridge OSP: 2
Andrew Molera SP
El Corte de Madera OSP
Fort Ord NM
Mt. Madonna SP
Rancho Cañada del Oro OSP
San Pedro Valley CP
Sierra Vista OSP

Months:

Mar.: 1
Apr.: 8
May: 4
Jun.: 2
Jul.: 2

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Taxon info: iNaturalist – Calflora – CalPhotos – Jepson eFlora – FNA

Bay Area species: iNaturalist – Calflora