In the Mira Dunes and Pine Woods Forestry Perimeter, Portugal.
Rattlesnake grass were everywhere along the top of the creek. They were hanging in groups or 2-3 on the tips of the stems.
Non-native, invasive grass
to 8" tall
Briza is a genus of annual and perennial grasses in the family Poaceae, native to northern temperate regions. The group is generally referred to as the quaking grasses because the flowers and seedheads shake on their stalks in the slightest breeze. Some of its members are grown as ornamental plants.