Unknown fruiting plant

Unknown fruiting plant

Observation - Unknown fruiting plant - UK and Ireland. Description: A fruit that looks similar to a strawberry. Has a yellow flower similar to a buttercup, leaves are strawberry-like. Very low to the ground, has runners like a strawberry. Yellow flowers in june and july, fruit in july and august. I am really stumped as I

A fruit that looks similar to a strawberry. Has a yellow flower similar to a buttercup, leaves are strawberry-like. Very low to the ground, has runners like a strawberry. Yellow flowers in june and july, fruit in july and august. I am really stumped as I know my flowers quite well but I do not know this one