Cucumis metuliferus

Lore & Background

Cucumis metuliferus is an annual vine in the family Cucurbitaceae. Its fruit, known as kiwano or horned melon, has horn-like spines and orange skin with lime-green flesh. The plant is native to Southern Africa, including South Africa, Namibia, Botswana, Zambia, Malawi, Zimbabwe, Mozambique, and Angola. In northern Zimbabwe, it is called gaka or gakachika and is primarily used as a snack or salad, rarely for decoration. It can be eaten at any stage of ripening, and some also eat the peel, which is rich in vitamin C and dietary fiber.

Reader's Guide

Cucumis metuliferus holds significance as a traditional food plant in Africa, particularly as a water source during the dry season in the Kalahari Desert, alongside the gemsbok cucumber and tsamma. Its fruit is consumed as a snack or salad, and its taste has been compared to combinations of banana and passionfruit, cucumber and zucchini, or banana, cucumber, and lime. The plant is also used agriculturally: it may be grafted as rootstock for melon to prevent growth reduction and nematode buildup in infested soil. Kiwano shows resistance to some pests and diseases, including certain root-knot nematodes and watermelon mosaic virus, though it is sensitive to squash mosaic virus and Fusarium wilt in some accessions. Germination is optimal between 20–35°C, and salinity increases germination time. Fruit development over 28 days shows changes in pH, sugar content, and peel color from green to orange. Its legacy lies in its dual role as a drought-season food and a potential crop for nematode management.

Did You Know?

• The fruit's taste has been compared to a combination of banana and passionfruit.
• It is one of the few sources of water during the dry season in the Kalahari Desert.
• The peel is very rich in vitamin C and dietary fiber.
• Kiwano is resistant to several root-knot nematodes and watermelon mosaic virus.