In Sarawak, and in Australia, Mother brought back this vegetable from the garden. She didn't grow it. Once you clear it, it sprouts by itself. We called it Ma See Hin aka Horse Shit spinach. However horrible it sounds, it taste quite nice.
In New Zealand, I became my mum. When I clear my vegetable garden, I got this Ma See Hin. But the parallel ends here, you have to harvest it early. Left too long, it flowers and becomes too stringly. Like my photo.
There is another type which is cultivated. My Mum called the veg Hin Choi. There is one type that is green, and another red stemmed.