Watercress is a water-dwelling cruciferous plant. It has a high protein-to-calorie ratio. One cup of watercress (34 grams) has 0.8 grams of protein.
Sprouts of alfalfa are low in calories and rich in nutrients. One cup of alfalfa sprouts (33 grams) offers 1.3 grams of protein.
Spinach is one of the leafy green vegetables with the highest nutrient density. One cup of raw spinach (25 grams) contains 0.7 grams of protein.
Chinese cabbage, which comprises napa cabbage and bok choy, has a high protein per calorie value.
Asparagus is a widely consumed vegetable with a high nutritional value. One cup of asparagus (134 g) has 3 g of protein.
Mustard greens are a member of the Brassica genus. They resemble kale but have a unique mustard flavor.
Collard greens are dark-green, loose-leafed vegetables related to kale, broccoli, and cauliflower.
Broccoli is a popular vegetable that also contains all of the essential amino acids and proteins. It can be consumed either raw or cooked.
Brussels sprouts are an excellent complement to the majority of diets. Brussels sprouts contain 3 g of protein per cup (88 g).
Similar to broccoli, cauliflower contains an abundance of protein relative to its caloric content. One cup of cauliflower (107 grams) has 2 grams of protein.