(Ranunculus scapiger)
Ranunculus�/r�?n??kj?l?s/�is a�genus�of about 500�species�of�flowering plants�in the family�Ranunculaceae. Members of the genus include the�buttercups,�spearworts�and�water crowfoots. The petals are often highly�lustrous, especially in yellow species, owing to a special coloration mechanism: the petal's upper surface is very smooth causing a mirror-like reflection.The flash aids in attracting�pollinating�insects and�temperature regulation�of the flower's reproductive organs.�Buttercups usually flower in the spring, but flowers may be found throughout the summer, especially where the plants are growing as opportunistic colonizers, as in the case of garden weeds.