This member of the Cucurbitaceae family was given this name by Otto Wilhelm Sonder. It's from South Africa up through eastern Africa pass the Arab peninsular pass India to Indonesia. Give it a well-drained soil, some water and sun, and the caudex will grow to 20 centimetres in diameter and the vines from three to six meters. The flowers are yellow and it is a monoecious plant. The genera is named after Josef Zehner, an Austrian botanical illustrator. The species name means 'rough'. Photos by Daniel Dytfeld. Photos by Daniel Dytfeld. Grit 5 mm.

