The cucumber (Cucumis sativus) is a creeping, herb-like vegetable of the same genus as the pumpkin, the African gourd and the melon (the cucurbit family). The plant, which grew completely naturally at the foot of the Himalayas, was first used by humans some 3000 years ago.
String beans (Phaseolus vulgaris) are grown as vegetables in all temperate and warm climate regions of the world. Rich in starch and protein, string beans play a major part in people’s diets. Their stems, wrapped around a support and with limited branching, can reach a height of four metres.
When harvesting the tree onion (Allium cepa proliferum), you don’t cut off the bulb, as you would with other onions; instead you pluck off its little bulblets. Originally from Southern Europe and Egypt, its green-blue stems, between 50 and 80 cm in height, are permanent and are somewhat reminiscent of chives.