large trefoil (trifolium aureum). flower closeup

chrysaspis aurea fabaceae leguminosae trifolium aureum alae anthesis banner calyx corolla floral bud flower isolated keel petal lateral view papilionaceous pedicel sepal standard sulcate vexillum wings large trefoil golden clover hop aureum closeup virtual herbarium belarus flora: focus-stacked closeups wild cultivated plants including flowers leaves fruits intended illustrations botanical manuals