A persimmon is a berry which grows on a persimmon tree, a group of species within the larger group Diospyros. The Diospyros trees are part of the majestic ebony family, and indeed persimmon trees are likewise noted for their hard, dense, elegant wood. The Diospyros are widespread trees, and native species of persimmon can be found in East Asia, Central Asia, South Asia, the Philippines, and North America.
Persimmon berries (or fruit, as people call them) are an excellent source of dietary fiber, manganese, and beta-carotene (which people are always banging on about, but which I think is overrated). They do not otherwise contain significant nutrients…except perhaps sugars (once they have been sufficiently ripened or bletted). Unripe persimmons are astringent and somewhat indigestible. Indeed, green persimmons are noted for sometimes causing bezoars in humans who eat lots of green persimmons–the unripened flesh polymerizes into a woody ball which traps other food materials. These horrifying lumps can necessitate surgery (although apparently coca-cola dissolves them).
Persimmon trees are rugged and grow fast. Not only do their blossoms emerge after their leaves, which protects the buds from frost, they can also survive in polluted or unfavorable situations. My grandfather had a garden and a fruit orchard next to the Chesapeake Bay. The East Coast is slowly (or maybe not-so-slowly) receding into the ocean and the persimmons lived shockingly close to the saltwater until Hurricane Fran knocked them down in 1996. Throwing a football around while running across the slippery rotting fruit is my foremost persimmon memories, although I have also drunk the Korean spicy punch called sujeonggwa (and I found it delightful). Maybe I should try making a persimmon pie!
Additionally there is a beautiful autumnal orange color named after persimmon. It is a mid-tone orange with hints of red, almost the same hue as senior republicans, but slightly darker with woody brown notes. I like to write about seasonally appropriate colors, and I can hardly think of a hue more suited to early November (unless it is some sort of russet or woodland gray).