Doum Palm

Hyphaene thebaica is unusual among palms because its trunk forks repeatedly into branches, each ending in a crown of stiff, fan-shaped leaves. It grows to roughly ten metres in desert wadis, oases and river valleys. The fruit is large, ovoid and glossy brown to orange-brown, about the size of a small fist, with a fibrous, dry, sweet and spiced pulp around a very hard seed.

The seed itself is round, ivory-coloured and extremely hard, with a smooth shell and a tiny hollow in the middle that holds a little liquid when young. When the fruit is fully ripe, the pulp has a flavour reminiscent of gingerbread or dried gingersnap, which is where one of its English names comes from.

The doum palm grows naturally across the dry belt of Africa from Senegal east through the Sahel, the Nile Valley and Red Sea coast to the Horn of Africa, and into the Arabian Peninsula. It prefers sandy soils with access to groundwater, such as the margins of oases and seasonal streams, and tolerates heat and salinity.

The name doum, also spelled dum or dom, comes from the Arabic dawm or dūm, and in the Egyptian context it is used for this particular palm. The genus name Hyphaene is from the Greek hyphainein, meaning to weave, which refers to the fibre use of the leaves, and thebaica relates to Thebes, the ancient Egyptian city where the tree was known.

The doum palm has an important place in the ancient Egyptian record. Fruits and seeds have been found in tombs dating to the early dynasties, and the palm appears in Egyptian art and texts, where it was linked with the god Thoth in some depictions. It was a source of food, fibre and timber in the Nile Valley for thousands of years, and fruits placed in graves may have served as offerings for the afterlife.

In later periods the fruit continued to be eaten and sold in markets from Egypt and Sudan across the Sahel. The sweet pulp was ground into flour or boiled into a drink, and a refreshing doum drink is still served in Egypt and Sudan in some seasons. The leaves are woven into mats, baskets and ropes, and the trunk provides wood that resists termites.

The hard seed is nearly as dense as ivory, and so craftspeople have long carved it into beads, buttons and small ornaments. Traders in the nineteenth and twentieth centuries used the term vegetable ivory for the hard seeds of several palms, and doum seeds were among those that entered such trade. Today the palm is still widely used in rural Africa, and its seeds appear in local crafts and in traditional medicine.

The dry, sweet pulp is eaten as a snack, ground into a gingerbread-flavoured flour for cakes and porridge, or soaked to make a sweet drink. The young, soft seeds are sometimes eaten, since the kernel is edible while still tender before it turns stony. Palm sap can be tapped and fermented into palm wine in some regions.

The mature seed is used as vegetable ivory for beads, buttons, carvings and jewellery. Leaves are plaited into baskets, mats and thatch, and the fibre into cordage. The timber is used in construction, and the tree provides shade and stabilises soil in oases.

Doum fruit pulp is a source of carbohydrates and fibre and has been studied for polyphenols and other plant compounds. In Egyptian and Sudanese folk medicine, doum drink is used as a cooling beverage and a traditional remedy for blood pressure and digestion, but clinical evidence for such effects is limited and mostly based on small or animal studies.

The hard seed is not a normal food once mature. The fruit is generally considered a safe traditional food in the amounts people usually eat, though solid nutritional data are not widely available, so it is best viewed as a regional treat rather than a health product.