Arrowhead is a tuberous bulb that is a delicacy usually eaten during the Chinese New Year season. Its scientific name is
Sagittaria sagittifolia, a member of the
Alismataceae family. It grows wild in marshlands in Europe and Asia, and is cultivated in China and Japan.
Arrowhead (25 May 2012)

Arrowhead is harvested for its bulbous tubers, which is called "chee ku", which means "good mushroom". Arrowheads are usually deep fried or stir fried, and is tasty, with a sprinkling of sugar. The starchy arrowhead is crunchy and makes a delightful snack for Chinese New Year.
When selecting arrowheads, choose those with fresh tip, preferably green and healthy. Avoid those where the tip is rotting or bruised. When slicing arrowheads, it is handy to hold it by the stem. This makes handling the arrowhead much easier.