Chinese spinach

Any of several plants grown as leaf vegetables:

Ipomoea aquatica, water spinach, a semi-aquatic plant with hollow stems and long, lance-shaped leaves.

Any of several plants grown as leaf vegetables:

Amaranthus dubius, often bearing red or purple marks

Any of several plants grown as leaf vegetables:

Amaranthus tricolor, edible amaranth

Any of several plants grown as leaf vegetables:

Basella alba, Malabar spinach, with thick, succulent, heart-shaped leaves

Any of several plants grown as leaf vegetables:

Capsella bursa-pastoris (shepherd's purse)