Tetragonia Expansa is a leafy green vegetable that is commonly known as New Zealand Spinach. However, there are many other synonyms for this plant that is native to Australia and New Zealand. Some common synonyms for Tetragonia Expansa include sea spinach, warrigal greens, Botany Bay spinach, and kōkihi. The leaves of this plant are similar in taste and texture to spinach, which is why they can be used as a substitute in many recipes. Other synonyms for Tetragonia Expansa include beach spinach, saltbush, and coastal spinach. These variations in name reflect the different regions where this plant grows and has been traditionally used for food and medicinal purposes.