Long red pepper, sometimes called Indian long pepper or pipli, is a flowering vine in the family Piperaceae, cultivated for its fruit, which is usually dried and used as a spice and seasoning. Long pepper has a taste similar to, but hotter than, that of its close relative Piper nigrum – from which black, green and white pepper are obtained.
The fruit of the pepper consists of many minuscule fruits – each about the size of a poppy seed – embedded in the surface of a flower spike that closely resembles a hazel tree catkin. Like Piper nigrum, the fruits contain the alkaloid piperine, which contributes to their pungency. In Vietnam, this spice is commonly grown in Binh Dinh, Quang Nam, Bien Hoa, Binh Duong, Binh Phuoc, Cu Chi… with excellent quality.