Species of tree
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Ravenala madagascariensis, commonly known as the traveller's tree, traveller's palm or East-West palm, is a species of monocotyledonous flowering plant found in Madagascar. It is not a true palm but a member of the family Strelitziaceae. 
Name.
It has been given the name "traveller's palm" because the sheaths of the stems hold rainwater, which supposedly could be used as an emergency drinking supply for needy travellers. Another plausible reason for its name is that the fan tends to grow on an east–west line, providing a crude compass.
Description.
The enormous paddle-shaped leaves are borne on long petioles, in a distinctive fan shape aligned in a single plane (distichous). The large white flowers are structurally similar to those of its relatives, the bird-of-paradise flowers "Strelitzia reginae" and "Strelitzia nicolai", but are generally considered less attractive, with a green bract. These flowers, upon being pollinated, produce brilliant blue seeds. In tropical and subtropical regions, the plant is widely cultivated for its distinctive habit and foliage. As the plant grows older, it progressively loses the lowest or oldest leaves and reveals a sturdy grey trunk. Of the four forms, varieties or subspecies, the largest is the "Bemavo", from the hills of eastern Madagascar, which can be 100 feet (30 metres) in height with a trunk 2 feet (60 cm) thick. The foliar fan consists of 30 to 45 leaves for mature specimens, each as much as 36 feet (11  metres) in length.
The chromosome number is 2n = 22.
Range and habitat.
"Ravenala madagascariensis" is widespread in Madagascar, including humid lowland forests, montane forests, grassland, and rocky areas, from sea level to 1,500 meters elevation.
Ecology.
Ruffed lemurs are a known pollinator of this plant, and given the size and structure of the inflorescences, as well as the lemur's selectivity, method of feeding, and long muzzle, this relationship is thought to have coevolved.
Cultivation.
The plant requires a sunny spot (not full sun until it is larger). It responds well to fertiliser, especially if it is high in nitrogen during the growing season. This produces better growth and foliage. The plant grows to an average height of and requires moderate water.
References.
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