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Drift seeds (also sea beans) and drift fruits are seeds and fruits adapted for long-distance dispersal by water. Most are produced by tropical trees, and they can be found on distant beaches after drifting thousands of miles through ocean currents .
Drift seed, a seed of any of a number of tropical plants growing in coastal areas, the seeds of which are found floating upon ocean currents, by means of which the seeds are dispersed. Mucuna gigantea, a tropical species of liana dispersed in this way.
Drift seeds of three legume species, found in May 2004 at Kanda village, on the southern Mozambique coast. The species are: Sea bean, Entada rheedii, Mimosaceae; Nickernut, Caesalpinea bonduc, Caesalpineaceae; Giant mucuna, Mucuna gigantea, Fabaceae (two forms shown, mottled and tan, possibly from different origins) Date: May 2004: Source: Own ...
Guilandina and Merremia seeds sometimes drift long distances. In 1693 James Wallace referred to them being often found in Orkney : "After Storms of Westerly Wind amongst the Sea-weed, they find commonly in places expos'd to the Western-Ocean these Phaseoli . . . .
This category collects plants whose fruits or seeds are used for decoration. This often includes pods, cones and nuts of large proportions and/or extravagant shape. Many drift seeds are used in this fashion by seaside communities. Also, many seeds of ovoid and round shapes, often with complex surfaces, are used for making prayer beads.
The seeds of these legumes are buoyant drift seeds, and are dispersed by rivers. Taxonomy
Inside the pods are ten to fifteen seeds, each of which have a diameter of 6 cm (2.4 in) and a thickness of 2 cm (0.79 in). [6] The seeds contain a hollow cavity, which gives them buoyancy. After being washed by rain into rivers and then the ocean, the seeds of E. gigas drift long distances on ocean currents. Seed buoyancy and vitality lasts at ...
Its seeds are found on east and southern African beaches, having grown on river and estuary banks and in swamp forest. As a result of its ready dispersal by sea, Entada rheedii is widely distributed in tropical and subtropical areas (excluding the Americas): tropical Africa, South Africa, tropical Asia and Queensland.