Kangkong is a type of swamp cabbage or water spinach native to the Philippines. It grows everywhere and needs very little cultivation. It is often used in Asian cuisine, stir fried with minced garlic.
Kangkong is known in English as water spinach or river spinach. This is typically found throughout the tropical and subtropical parts of the world. This vegetable has a tender shoot and leaves.
I think that a rafflasia has unpleasant smell.