Artichokes are perennial in my zone. While the blooms are stunning, if you seem them it is too late to eat the artichoke. Letting a few go to seed, especially at the end of the season on plants 4 years old or more, is both beautiful and thrifty - start those seeds for next year, to have young plants with higher production.
The banana plant inflorescence - before the banana turns into an actual banana, it actually is a flower. This flower, called a banana heart or inflorescence, is edible as well. It’s used in Indian cuisine as a vegetable, served steamed with dips and cooked in soups, fried foods, and curries. The heart is fleshy, and its flavor has been likened to an artichoke.