Orange Hawkweed (Hieracium aurantiacum) is an original plant from mountainous regions of Central and South Europe. Initially it was introduced in North America and Australia as ornamental plant and then started to grow in the wild, currently being considered a harmful plant. This flower blooms from May to June, its color varying from red to orange. When the leaves and stem are sectioned, a white sap can be seen, viscous and rich in latex.