The Grassy Arrowhead (Sagittaria graminea) is a freshwater aquatic perennial flowering herb in the Alismataceae family. It is also known as the Grass-Leaved Arrowhead.
It is native to North America in marshes and the banks of rivers, ponds, and lakes.
It grows up to 100 centimetres (39 inches) tall.
It has long, grass-like green leaves that are submerged underwater.
Its flower is small and white with three petals and a yellow centre.
Photographed in the Botanical Garden, Paris, December 2021.
Photographer: Martina Nicolls