Leaf vegetables, also called leafy greens, pot herbs, vegetable greens, or simply greens, are plant leaves eaten as a vegetable, sometimes accompanied by tender petioles and shoots.
https://en.wikipedia.org/wiki/Leaf_vegetable
Nutrition
Spinach, as an example of a leaf vegetable, is low inĀ caloriesĀ andĀ fatĀ per calorie, and high inĀ dietary fiber,Ā vitamin C, pro-vitamin AĀ carotenoids,Ā folate,Ā manganeseĀ andĀ vitamin K.
The vitamin K content of leaf vegetables is particularly high, since these are photosynthetic tissues andĀ phylloquinoneĀ is involved inĀ photosynthesis. Accordingly, users ofĀ vitamin K antagonistĀ medications, such asĀ warfarin, must take special care to limit consumption of leaf vegetables.