Porphyra head, also known as red cabbage head and red root beet, belongs to Chenopodiaceae. It is a variety of beet. It can be eaten raw, cooked or canned with fatty roots. The meat is crisp and tender, slightly sweet, with high nutritional value, rich in sugar and various minerals, and has the functions of treating vomiting and diarrhea and expelling parasites in the abdomen. High economic benefits, strong foreign exchange earning capacity and great development prospects. Chinese milk vetch tastes slightly sweet, crisp and delicious when eaten raw. Western food is mainly raw food, and colorful salads are made with root vegetables of various colors or single color. The traditional eating method is to cook the fleshy roots and make them into mud. Add seasoning and stir well.

Porphyra head, also known as beetroot and cabbage head, evolved from a wild plant called seaweed root that grew on the Mediterranean coast. Beet root is as red as fire, also known as flame dish. Beet root has a long history as food. It contains minerals and plant compounds peculiar to beetroot. These compounds can resist infection, increase oxygen content in cells, and treat blood diseases, liver diseases and immune system dysfunction. Beet root contains folic acid, which is very beneficial to human body, and this element is one of the important substances to prevent anemia, and also has the functions of anti-cancer, prevention of hypertension and Alzheimer's disease. In the traditional medical methods of ancient Britain, beetroot is an important medicine for treating blood diseases and is known as the "root of life". Below is a picture of laver head.

Analysis:

You are probably asking about the head of laver, a beet plant of Chenopodiaceae. Plants have different shapes in different environments. Porphyra heads growing in vegetable fields are green because of photosynthesis and chlorophyll.