Chinese spinach

Noun

 * 1) Any of several plants grown as leaf vegetables:
 * , water spinach, a semi-aquatic plant with hollow stems and long, lance-shaped leaves.
 * , often bearing red or purple marks
 * , edible amaranth
 * , Malabar spinach, with thick, succulent, heart-shaped leaves
 * 1)  (shepherd's purse)