>>16849174. Greens.
Leaves, shoots, stems and such won't provide too many calories to your diet but are super high in minerals and phytonutrients that are vital to good health. They are usually very abundant and often common garden weeds and there's always at least one type available at some point in the year. Greens are best eaten in the traditional manner: fried with oil. This helps you eat more greens, makes them more digestible, adds calories, and the fat helps convert plant vitamin A into human form of vitamin a and coats the tongue so they don't taste as bitter. There's so many different species so here's a list of a few notable ones.
Basswood leaves. Great when first leaf out in spring, texture gets tough as season goes on.
Henbit. Can be found through the winter
Ostrich fern. Edible in the fiddle head stage in spring. Very tasty
Lambs Quarter (pic related) super high in minerals. Many times more calcium than spinach.
Dandelion. Tastes like ass but I'm including it because it's so abundant and recognizable.
5. Outliers
The stuff in this category don't fit in with the others and can potentially be a great source of calories and nutrients or not.
Syrups. Maple is the most common and has the most sugar in the sap so more efficient to boil down. Other trees that can be tapped for syrup are black walnut, birch and basswood but are usually only half as efficient as sugar maple. Potentially a great source of sugar and minerals but requires a lot of equipment to get anything.
Seeds. Wild rice can potentially be a staple food if you have a suitable body of water but it requires lots of proccesing time skill and equipment including a canoe. Other seeds like curly dock and goosefoot seeds tend to be bitter and hard to process
Cambium. Inner bark of trees like birch and basswood. Can be high in nutrition but the texture is nothing you want to eat. Usually for emergencies or medicine only.