Oh you can guess I love tea's ,and bitter stuff haven't tried the hop tree yet
(of coarse sometimes sweetening transforms it as well ie. bitter chocolate
the fat in milk binds to the tannin smoothies can do improve flavor as well. )
I forgot to add the chittamwood berry has more of a Juniper like flavor to me
Used as a flavoring At least the one I've ate
One thing to note is the Latin name changed (Bumelia)
(See what I mean some sites may not list Sideroxylon --
(I was confused for a minute I read it there before )
https://pfaf.org/user/Plant.aspx?LatinName=Bumelia+lanuginosaThere is trees that grow hot climates , and adapted to grow in temperate places
Osage orange is native to Louisiana TX, and northern Florida , it grows here as well -20 F..
I am sure more tree's may adapt if they have a range tropical, and temperate
given they have some protection the first couple years just maybe no one tried .
With your post I think Solanaceae the tomato Family
maybe some of those can be grown as Annuals every year tomato is tropical,
and they have the largest at fruit, and spice park over 20 years old
(native ) ground cherries are pretty good
Chinese Lantern is good as well
water melon is in the gourd family native to Africa Cucurbitaceae has interesting fruits as well
maybe grown as a annual with a head start to ripen , generations of seed down the line maybe they will adapt
just like peppers did .
http://www.eattheweeds.com/tag/citrullus-lanatus-var-citroides/
(stag horn sumac (Rhus) is in the Mango family also poison Ivy ,
do not make a sumac ade drink with the white berries use red
(by soaking the berries in water before a rain washes off the hairs the taste is sour some hints of raspberry )