Acanthosicyos horridus
 Acanthosicyos horridus is an unusual melon that occurs only in Namibia; it is locally called nara.The nara plant is leafless the modified stems and spines serve as the photosynthetic organs of the plant.The edible seeds are known locally as butterpips.The fruit serves as an essential food source for Topnaar people from February to April and August to September. The katydid Acanthoproctus diadematus feeds on the plant moving between different bushes at night.