Trifolium aureum, T. campestre; hop clover [Fabaceae]  Naturalized annual (biennial?) herbs with 3-parted leaves and small, cylindrical heads of bright yellow flowers.  Blooms throughout the summer.  T. aureum has slightly smaller flowers, palmately compound leaves and leaflets without petioles..  T. campestre has pinnately compound leaves and the terminal leaflet is stalked.  Both species are easily confused with Medicago lupulina (black medick), which has smaller flower heads.  [068]

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