Yes, broccoli leaves are edible. The younger they are the less bitter they are and can be consumed raw, having a similar taste to spinach. However, when they mature they are tougher and their flavor becomes a little more bitter similar to collard greens. Boil/Saute the mature varieties just as you would collard greens, but eat the younger stems/leaves raw. Usually, broccoli will not bud at all or will flower too rapidly if temperatures are too warm late in the season (above 70F) and you must use the leaves if you don't want to waste that years crop.
Yes, celery leaves are edible. They can be eaten raw or cooked, but are particularly good for flavoring in stocks, soups, or stews.
Yes, for example lettuce, spinach, and cabbage.
yes
yes
Palm leaves are not considered edible leaves for humans. These palm leaves might be edible for a variety of other animals though.
No, the leaves of the common varieties of maple trees are not edible.
yes the leaves on the jack in pulpit is edible
yes they edible.
The leaves of herbs (parsley, basil, oregano etc.) are edible, many other types of leaves are poisonous.
Yes, the flowers and leaves of the primrose are actually edible.
No, the leaves of the common varieties of maple trees are not edible.
yes the leaves on the jack in pulpit is edible
yes, they are perfectly edible.
Yes, the petals are edible, and the leaves can be used to make tea.
That is the purpose for which they are grown
nopales are edible cactus leaves.