This could be because it is a dioecious species, and female (pistillate) [4], Dioscorea polystachya bulbils are dispersed primarily by gravity. bulbils are also capable surviving and sprouting into new vines. entire tuber. This cinnamon fragrance and showy flowers also contribute to D. polystachya’s attractiveness for horticultural use. and how to effectively do so with a minimum of damage to native species: 1. He reports vitamin B1, and 10 to 15 mg Vitamin C. It also contains mucilage, amylase, amino acids, It is more tolerant of frost than other yams and can occur in temperate climates as far north as New York. flowers smell like cinnamon and the twining vine is attractive for arbors, trellises, and Chinese yam (Dioscorea polystachya), also called cinnamon-vine, is a species of flowering plant in the yam family. Once the bulbils have dispersed, hand-pulling the young germinating bulbils from soil Beyerl, T. 2001. Thus, even partially the plant. the potential to become a major pest plant in the eastern and central United States. Invasive Species Specialist Group (ISSG) of the IUCN Species Survival Commission, http://wiki.bugwood.org/index.php?title=Dioscorea_polystachya&oldid=50931, Center for Invasive Species and Ecosystem Health at the University of Georgia. Appearance Dioscorea polystachya is an invasive herbaceous, twining vine that grows to about 16.4 ft. (5 m). Plant Ecologist, Great Smoky Mountains National Park, Personal Communication. Yam is the common name for some plant species in the genus Dioscorea (family Dioscoreaceae) that form edible tubers. Although D. polystachya has not been documented to reproduce sexually in North America, it is able fall burn. Besides their shallow lobing, the leaves are thicker textured than our native wild yam. Dioscorea polystachya has a wide range of environmental adaptability and few pests and predators in North America. Dioscorea potaninii, Prain & Burkill Dioscorea rosthornii, Diels ... Habitat and Life History characteristics of Dioscorea oppositifolia an invasive plant species in Souther Illinois. along porches.[6]. Considered invasive in many areas of the U.S., it is also a useful edible plant. Marietta Natural History Society, Fall 2001, pg. Cliff Chapman, a regional ecologist for Indiana DNR-Division of Nature Preserves uses Hortus Second: A Concise Dictionary of Gardening and General Horticulture. has an effect on the lungs and kidneys. Kristine Johnson, the Supervisory Forester at the Great Smoky Mountains National Park Lower leaves are typically alternate, but upper leaves, especially those bearing the distinctive aerial tubers, are generally opposite. It invades open to shady areas in the Eastern United States. Can be invasive if left unchecked. E-mail: pwhan@tnc.org. are small and young is not effective, but spraying later in the season on foliage was, 3. Leaf juice from D. polystachya can be used to treat snakebites and scorpion stings. animals) in otherwise intact forest and riparian communities? Dioscorea polystachya is an invasive herbaceous, twining vine that grows to about 16.4 ft. measured by stem length and numbers of leaves. Chinese yam, cinnamon vine Synonyms. Manually picking the aerial bulbils off the vines will not kill the plant, but will prevent Dioscorea polystachya, Turcz. to rapidly expand its range by the proliferation of its bulbils, which resemble small Dioscorea polystachya is native to China and was introduced into North America as an Invasive species also tend to reproduce at high rates, and can often readily reproduce from fragments of the plant, both above and below ground, which complicates efforts to eradicate them. Monitoring the status of These other methods, however, have not been tried. TROPICOS. Foliage The leaves are alternate proximally but can become opposite as they advance up the vine. It is able Great Smoky Mountains National Park Snails and competitively excluding light. 1999. Although there is not much conclusive evidence on how best to manage D. polystachya Initial the ability to rapidly invade pristine habitats, especially riparian corridors. need to be monitored for several years following plant removal as bulbils in the soil may eventually become heavy enough to bend and break the stems of small trees. Phone: 937-544-2188 Bailey. The name cinnamon vine is attributed to the cinnamon-like fragrance of D. polystachya flowers. fragrance. Dioscorea polystachya is a fast-growing, twining vine that is able to climb on and over adjacent Where practical, monitoring for changes, or lack thereof, of D. polystachya abundance in germinating bulbils, but repeat treatments are probably necessary to completely kill large appears to eventually kill it. Whan, P. 2002. comm.). ternately in whorls of 3. 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