Paper mulberry was used among ancient Austronesians in making barkcloth. It originates from subtropical regions in mainland Asia and is one of the best examples for the mainstream "Out of Taiwan" hypothesis of the Austronesian expansion. Various genetic studies have traced the origins of paper mulberry populations in the Remote Pacific all the way to Taiwan via New Guinea and Sulawesi. In the Philippines,which was along the expansion path,paper mulberries are mostly descendants of modern introductions in 1935. Ancient introductions of paper mulberry presumably went extinct in prehistory due to their replacement with hand-woven fabrics,given that paper mulberry generally only survives under human cultivation. However,its absence in the Philippines further underlines its origins in Taiwan,and not within island Southeast Asia. Additionally,paper mulberry populations in New Guinea also show genetic inflow from another expansion out of Indochina and South China. [6] [7] [8]
It is believed to be the most widely transported fiber crop in prehistory,having been transported along with the full range of the Austronesian expansion,as opposed to most of the other commensal crops in Oceania. Paper mulberry is present in almost every island or island group in Polynesia,including Rapa Nui and Aotearoa. Some populations have gone recently extinct after they stopped being cultivated,such as in the Cook Islands and Mangareva,although accounts and prepared barkcloth and herbarium specimens of them exist in museum collections gathered by Europeans during the colonial era. They were spread by Polynesians primarily through vegetative propagation with cuttings and root shoots. They were rarely cultivated from seeds,as most plants were harvested prior to flowering,when the stems reach around 1 in (2.5 cm) in diameter,as described by 18th-century European accounts. If the feral plants reproduced sexually is unknown,as the plants are dioecious and require both male and female specimens to be present in one island. [6] [7] The tree was introduced to New Zealand by early Māori settlers (oral histories mention the Ōtūrereao , Tainui and Aotea canoes as being sources). [9] The tree was commonly seen during the voyages of James Cook in the 1770s,however the tree likely became extinct [10] by the 1840s,due to reduced cultivation and predation by pigs and cattle who fed on the tree. [9] It was reintroduced to New Zealand from Japanese plants during European colonisation. [9]
This species is a deciduous shrub or tree usually growing 10–20 m (33–66 ft) tall,but known to reach 35 m (115 ft) at times. The leaves are variable in shape,even on one individual. The blades may be lobed or unlobed,but they usually have toothed edges,lightly hairy,pale undersides,and a rough texture. They are up to about 15–20 cm (5.9–7.9 in) long. The species has male and female flowers on separate plants. The staminate inflorescence is a catkin up to 8 cm (3.1 in) long with fuzzy male flowers. The pistillate inflorescence is a spherical head up to about 2 cm (0.79 in) wide with greenish female flowers trailing long styles. The infructescence is a spherical cluster 2–3 cm (0.79–1.18 in) wide containing many red or orange fruits. Each individual protruding fruit in the cluster is a drupe. [3] [4]
This plant has been cultivated in Asia and some Pacific Islands for many centuries for food,fiber,and medicine. [4]
Broussonetia papyrifera |
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Morus papyrifera |