Wintermelon looks the same as this vegetable.
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calabash
director
gourd
The Upo plant is known as bottle gourd in the United States. It is very good to eat and the gourds can grow to over 3 feet long. It looks something like a big cucumber. It is a vegetable. I have grown them for years. Upo is the Filipino name. I have seen them growing in the Philippines and in Asia.
"Upo" in Swahili means "are you there" or "are you present." It is commonly used in casual conversations to check if someone is available or around.
The English term for karlang vegetable is bitter melon or bitter gourd.
bottle gourd
Pana or panapen is not a vegetable, it's a fruit, but that is another question. In English it is called Breadfruit.
vegetable hummingbird
"Upo" in Swahili means "you are there" or "are you there."