It appears to be a Clover but since there is no scale, there's more than one plant in the picture, the lighting is very dark and only the backs of the leaves are shown I can't be certain whether it is Trifolium repens (White Clover) or one of the other clovers. If you could take some more pictures showing the leaves more clearly and the flower, which is probably open by now, I'll try to be more specific.

Thanks Floral, hope this helps.

Could it be Alsike clover?