vegeteble Karela
Amongst them, karela is reported to be extremely beneficial according to my knowledge it does not have no sugar. very good for people with high blood pressure.
Bitter melon
If i am correct there are 2 types of Indian vegetable that sound like this but unfortunately i only know what they are called in gujerati and not English. The first is Kantola and the second is Karela. Both are somewhat bitter in taste but fantastic as a curry!
Karela
The Rangoli called in Kerala is kolam.
Wintermelon looks the same as this vegetable.
Pana or panapen is not a vegetable, it's a fruit, but that is another question. In English it is called Breadfruit.
It is Karela in Hindi. ( करेला )
Bitter Lemon
vegetable hummingbird
Its a vegetable from family of Mustard and spinach. You have to have taste developed for it, otherwise, you will find it a little bitter in taste, just like 'Karela'. Its very healthy and rich in iron and many other vitamins. I love it.