Dou Dong Arrowhead

Dou Dong Arrowhead

　　Dadong Town Dutouwei Village: Dou Dong Arrowhead.

Arrowhead (genus Sagittaria) is a freshwater plant comprising about 20 species widely distributed around the world. It is a perennial herb that grows in shallow lakes, ponds, and streams. Its leaves are arrow-shaped, and it has an edible fleshy tuber. The flowers have three round petals. The most common species in North America is the broadleaf arrowhead (S. latifolia), which has arrow-shaped to grass-like leaves and is widely cultivated to provide food for waterfowl. The common arrowhead (S. sagittifolia) is found in much of Europe, while in China it is cultivated mainly for its edible tubers.