Xanthosoma sagittifolium

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Xanthosoma sagittifolium
Xanthosoma sagittifolium in Bukidnon, Philippines 01.jpg
In Bukidnon, Philippines
Arum flower.jpg
Inflorescence
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Monocots
Order: Alismatales
Family: Araceae
Genus: Xanthosoma
Species:
X. sagittifolium
Binomial name
Xanthosoma sagittifolium
(L.) Schott
Synonyms [1] [2] [3]
  • Alocasia talihan Elmer ex Merr.
  • Arum sagittifolium L.
  • Arum xanthorrhizon Jacq.
  • Caladium edule G.Mey.
  • Caladium mafaffa Engl.
  • Caladium sagittifolium (L.) Vent.
  • Caladium utile Engl.
  • Caladium xanthorrhizon (Jacq.)
  • Xanthosoma appendiculatum Schott
  • Xanthosoma atrovirens K.Koch & C.D.Bouché
  • Xanthosoma blandum Schott
  • Xanthosoma edule (G.Mey.) Schott
  • Xanthosoma ianthinum K.Koch & C.D.Bouché
  • Xanthosoma jacquinii Schott
  • Xanthosoma mafaffa Schott
  • Xanthosoma nigrum Stellfeld
  • Xanthosoma peregrinum Griseb.
  • Xanthosoma poeppigii var. mafaffa (Schott) J.F.Macbr.
  • Xanthosoma roseum Schott
  • Xanthosoma utile K.Koch & C.D.Bouché
  • Xanthosoma violaceum Schott
  • Xanthosoma xantharrhizon (Jacq.) K.Koch

Xanthosoma sagittifolium, or tannia, is a tropical flowering plant from the family Araceae. It produces an edible, starchy corm. X. sagittifolium is native to tropical America where it has been first cultivated. Around the 19th century, the plant spread to Southeast Asia and Africa and has been cultivated there ever since. X. sagittifolium is often confused with the related plant Colocasia esculenta (Taro), which looks very similar and is also used in a similar way. Both plants are often collectively named Cocoyam. [4]

Contents

Common names for X. sagittifolium include tannia, new cocoyam, arrowleaf elephant's ear, American taro, yautía, malanga, [5] [6] and uncucha. [7] Cultivars with purple stems or leaves are also variously called blue taro, purplestem taro, purplestem tannia, and purple elephant's ear. [8] [9]

Tannia is among the world’s most important tuber crops and feeds 400 million people worldwide. [10] There are multiple varieties, [11] the two most common being the red flesh and the white flesh variety. [12] They were artificially bred to improve pest and disease resistance, [13] to shorten the time it takes to reach maturity and to improve the cooking quality. [10]

Uses

Cooking

Tannia is a versatile crop with both its corm and leaves suitable for human consumption. The corms can be categorized into smaller secondary corms and main corms. Secondary corms are primarily used in various culinary applications, in similar ways as potatoes. They can be boiled, fried, roasted, steamed, baked, or ground into flour (see chapter Flour). The leaves of the tannia plant find common culinary use as a leafy green, similar to spinach. In contrast, primary corms are typically designated for animal feed rather than human consumption because of the higher amount of oxalates. [13]

In Bolivia, it is called walusa, in Colombia bore, in Costa Rica tiquizque or macal, in Cuba malanga, in Mexico mafafa, in Nicaragua quequisque, in Panama otoe, in Dominican cuisine is called yautía, yautía morada, and yautía coco and ocumo in Venezuela. In Brazil, the leaves are sold as taioba. The tuber (called nampi or malanga) is also used in the cuisine of these countries. The plant is often interplanted within reforestation areas to control weeds and provide shade during the early stages of growth.

In Puerto Rican cuisine and Dominican cuisine, the plant and its corm are called yautía. In Dominican Republic as well as in Puerto Rican pasteles en hoja , yautía is ground with squash, potato, green bananas and plantains into a dough-like fluid paste containing pork and ham, and boiled in a banana leaf or paper wrapper. The yautía corm is used in stews, soups, or simply served boiled much like a potato. It is used in local dishes such as guanime , alcapurrias , sancocho , and mondongo . In alcapurrias, it is also ground with green bananas and made into fried croquettes containing picadillo or seafood. Yautía majada is also prepared and consumed when mashed in some instances. Yautía puree is usually served with fish or shellfish cooked in coconut milk.

In Suriname and the Netherlands, the plant is called tayer. The shredded root is baked with chicken, fruit juices, salted meat, and spices in the popular Surinamese dish, pom. Eaten over rice or on bread, pom is commonly eaten in Suriname at family gatherings and on special occasions, and is also popular throughout the Netherlands. In Surinamese cuisine the leaves are also often baked with a Maggi-cube (chicken boullion cube) and eaten alongside rice and chicken or salted beef.

Flour

Flour can be made by slicing the rhizome and then drying it. Afterwards, it can be finely grinded. The yield of the starch is about 15%. [14] A big problem of tannia is the low storability because of the high moisture content of the corms and cormels. [15] Processing the tubers into flour could increase the storability of the crop and could increase the added value. Local farmers then would be able to sell their crop for a higher price, which could then help the local community. [15] Especially the white fleshed variety provides flour that has qualities that are great for making bread, since the resulting paste is not as cohesive and can therefore be used for the preparation of different foods. [12] Flour could also easily be used in meat and milk products. [14] A disadvantage of the flour is the (especially in comparison with flour made from cassava) lower starch content and it therefore would be best to only make flour as a byproduct of other processes. [10] It could also be made from cormels that do not provide the necessary quality for cooking. [16]

Chicken feed

Studies have shown that it’s possible to replace up to 45% of the maize grain in chicken feed with tannia corn meal (TCM). This could be useful for farmers since chicken feed which consists of maize grains is very expensive - especially in poorer countries. At the beginning of their growing phase, chickens fed with TCM consume significantly more because TCM reduces the nutrient uptake and weight gain. Later in the growing stage, this effect diminishes and in the end, there is no difference in the weight of chickens fed with TCM in comparison to chickens fed entirely with maize grains. [17]

Additional uses

Tannia is used by some populations as a medicine against tarantula, scorpion and snake bites. [10] Studies with rats have shown that tannia leaves could protect from cardiovascular diseases [18] and bowel cancer. [11] Other benefits include a reduced weight gain, reduced liver fat, increased fecal mass and higher concentration of short chain fatty acids and bile salt. [18] It has also shown a probiotic effect. [19] Another study has shown that tannia can stop the cell cycle and force apoptosis in a cancer cell. [11] Tannia also has been traditionally used to treat osteoporosis because of the high content of free calcium analyses. Studies have shown that the usage of tannia indeed is a feasible option for treatment for poorer communities without access to proper medication. [20]

Cocoa trees can grow in direct sunlight, but in some climates, the intense light in the afternoon can damage the leaves. Tannia has many leaves which makes it a good candidate for a cover crop that can protect the cocoa plant from direct sunlight. Another advantage of Tannia is that it can grow in many different climates and therefore would be suitable for many different countries. [10]

Tannia could also be used to make food preservatives (lactic acid), [11] energy bars, [19] chips and crisps, additives in beverages, sauce thickeners, purees, and sauces. [10]

Lastly, there is the possibility to use tannia to make ethanol for biofuel because of the high starch content and the high yield. [11]

Cultivation

Climate requirements

Although its exact native range is uncertain, the plant is now widely cultivated in the American tropics. This cultivation is not only for ornamental purposes but also, both privately and commercially, for its edible parts. [21] Xanthosoma sagittifolium is an adaptable plant that grows optimally in warm and humid conditions and temperatures above 25 degrees Celsius. [6] At lower temperatures and in arid climates, the development of the plant is hindered. For proper development, the plant needs rainfall evenly distributed throughout the year. [22]

It is noteworthy that tannia is one of the most shade-tolerant plants, which allows successful cultivation in traditional Agroforestry systems and facilitates intercropping with perennial crops such as bananas, cocoas or oil palms. [22] [23]

The optimal soil conditions for the plant to thrive are well-drained, loamy soils with a pH between 5.5 and 6.5. [22] However, Tannia can grow in various soil types, with the exception of hard clay or pure sand, but generally prefers soils high in organic matter. [23] In general, the plant's adaptability allows it to flourish in a wide range of soils and habitats.

Planting

The best time for planting depends on the local climatic conditions of the growing region. However, it is suggested to do the planting during the rainy season and when the soil is sufficiently moist. [22]

Small parts of the corms or cormels are used for planting. These propagating materials are typically planted at a depth of 7–10 cm, ideally with the growth bud pointing downward. [23] Planting is done in rows half a meter to one meter apart to allow the corms and cormels to develop well and to facilitate the harvest. [22] More dense planting leads to higher yields per field and less weeding, more space results in a higher yield per plant but more weeding work. [23] Crop Management is done manually using simple tools such as digging sticks or bush knives.

Harvesting

The typical tannia plant has a 9 to 11 months growing cycle. [24] During this time, it produces a large stem called a corm, which is surrounded by smaller edible cormels about the size of potatoes. Harvesting these edible aroids typically occurs when the leaves start to turn yellow. During the growth cycle, a plant typically produces approximately 40-50 leaves, which are usually harvested within a 40-50 day period. [22]

Mature cormels can be harvested continuously over an extended period of time, often exceeding 500 days, while the primary mother plant remains in the ground to produce a new crop. [24]

Harvesting is commonly carried out manually or with semi-mechanized equipment. After harvesting, the corms are cured to slow down the rate of physiological and pathological decay of the tuber, which would result in loss of quality. [24] Further losses may occur due to the short shelf life of the tubers. Also storage at ambient temperatures poses a challenge.

Nutritional Value

Tannia is an important source of starch in many African countries such as Ethiopia. Its tubers contain approximately 85% carbohydrates in dry matter. [25] Furthermore, the protein content amounts to 10% - a benefit for the resource-poor farmers by whom Tannia is mainly consumed. The plant is also rich in vitamin A and vitamin C and a good source of potassium, calcium and other minerals. [26]

However, the presence of the so-called calcium oxalate must be considered, a compound known to irritate mucous membranes, resulting in crystalline deposits commonly referred to as crystal sand. Consumption of these corms can lead to a scratchy sensation in the mouth and throat. To mitigate this effect, the corms need to be boiled before consumption, as this process allows the substances to dissolve in the cooking water, making the corms safe to eat.

Diseases

Root Rot Disease is the most important disease in Tannia. The oomycete Pythium myriotylum is probably the main causal agent of the Root Rot Disease. Other organisms that could be involved are Phytopthora ssp., Fusarium ssp., Penicillium ssp., Botrydioplodia ssp., Erwinia ssp. and Pseudomonas ssp. [27] [28] [29] Symptoms are stunted growth, wilting, chlorotic and withered leaves and a poor root system. The disease leads to low yields or even complete crop failure. [30] [31] The disease spreads through soil and planting material. The pathogens can persist for a long time in the soil, often forcing farmers to give up planting Tannia in infected fields for at least five years. Wetland, floodings and poorly drained soils are associated with the appearance of Root Rot Disease. As long as the field is not yet infected, the best method to control the disease is to use disease-free planting material. Further cultural control methods are general strengthening of plant health, drainage, crop rotation and planting on ridges. There are cultivars that are less susceptible to root rot, but none of them are resistant. Various fungicides are effective in case of infection. [28] [30]

Dasheen Mosaic Potyvirus is the most important virus that infects Tannia and other aroids. Symptoms are chlorotic mosaic patterns along the veins and stunting. The Dasheen Mosaic Virus is not lethal but can reduce the yield significantly. The virus is transmitted by aphids. It can be spread vegetativly by planting material and mechanically by sap transmission while using tools. It is therefore important to use virus-free plant material and to work hygienically. The control of the vector aphids would be effective, but is difficult. [32] [33]

Taro Leaf Blight , caused by Phytophthora colocasiae, is not a problem in Tannia. Some varietys of Tannia even seem to be resistant against it. On contrast, in Taro (Colocasia esculenta), a related and similar-looking crop plant, this is a major disease problem. [31]

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<span class="mw-page-title-main">Araceae</span> Family of flowering plants

The Araceae are a family of monocotyledonous flowering plants in which flowers are borne on a type of inflorescence called a spadix. The spadix is usually accompanied by, and sometimes partially enclosed in, a spathe. Also known as the arum family, members are often colloquially known as aroids. This family of 114 genera and about 3,750 known species is most diverse in the New World tropics, although also distributed in the Old World tropics and northern temperate regions.

<span class="mw-page-title-main">Cassava</span> Staple crop

Manihot esculenta, commonly called cassava, manioc, or yuca, is a woody shrub of the spurge family, Euphorbiaceae, native to South America, from Brazil, Paraguay and parts of the Andes. Although a perennial plant, cassava is extensively cultivated in tropical and subtropical regions as an annual crop for its edible starchy tuberous root. Cassava is predominantly consumed in boiled form, but substantial quantities are processed to extract cassava starch, called tapioca, which is used for food, animal feed, and industrial purposes. The Brazilian farofa, and the related garri of West Africa, is an edible coarse flour obtained by grating cassava roots, pressing moisture off the obtained grated pulp, and finally drying it.

<i>Colocasia</i> Genus of plants

Colocasia is a genus of flowering plants in the family Araceae, native to southeastern Asia and the Indian subcontinent. Some species are widely cultivated and naturalized in other tropical and subtropical regions.

<span class="mw-page-title-main">Root vegetable</span> Plant roots used as a vegetable

Root vegetables are underground plant parts eaten by humans or animals as food. In agricultural and culinary terminology, the term applies to true roots such as taproots and tuberous roots as well as non-roots such as bulbs, corms, rhizomes, and stem tubers.

<span class="mw-page-title-main">Corm</span> Underground plant stem

Corm, bulbo-tuber, or bulbotuber is a short, vertical, swollen underground plant stem that serves as a storage organ that some plants use to survive winter or other adverse conditions such as summer drought and heat (perennation).

<i>Xanthosoma</i> Genus of plants

Xanthosoma is a genus of flowering plants in the arum family, Araceae. The genus is native to tropical America but widely cultivated and naturalized in other tropical regions. Several are grown for their starchy corms, an important food staple of tropical regions, known variously as malanga, otoy, otoe, cocoyam, tannia, tannier, yautía, macabo, ocumo, macal, taioba, dasheen, quequisque, ʻape and as Singapore taro. Many other species, including especially Xanthosoma roseum, are used as ornamental plants; in popular horticultural literature these species may be known as ‘ape due to resemblance to the true Polynesian ʻape, Alocasia macrorrhizos, or as elephant ear from visual resemblance of the leaf to an elephant's ear. Sometimes the latter name is also applied to members in the closely related genera Caladium, Colocasia (taro), and Alocasia.

<span class="mw-page-title-main">Taro</span> Species of plant

Taro is a root vegetable. It is the most widely cultivated species of several plants in the family Araceae that are used as vegetables for their corms, leaves, stems and petioles. Taro corms are a food staple in African, Oceanic, East Asian, Southeast Asian and South Asian cultures. Taro is believed to be one of the earliest cultivated plants.

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<span class="mw-page-title-main">Cocoyam</span> Index of plants with the same common name

Cocoyam is a common name for more than one tropical root crop and vegetable crop belonging to the Arum family and may refer to:

<span class="mw-page-title-main">Eddoe</span> Species of plant

Eddoe or eddo is a species in genus Colocasia, a tropical vegetable, closely related to taro, which is primarily used for its thickened stems (corms). In most cultivars there is an acrid taste that requires careful cooking. The young leaves can also be cooked and eaten, but they have a somewhat acrid taste.

<i>Tacca leontopetaloides</i> Species of flowering plant

Tacca leontopetaloides is a species of flowering plant in the yam family Dioscoreaceae. It is native to the islands of Southeast Asia. Austronesian peoples introduced it as a canoe plant throughout the Indo-Pacific tropics during prehistoric times. It has become naturalized to tropical Africa, South Asia, northern Australia, and Oceania. Common names include Polynesian arrowroot, Fiji arrowroot, East Indies arrowroot, pia, and seashore bat lily.

<i>Alocasia odora</i> Species of flowering plant

Alocasia odora, also known as night-scented lily, Asian taro or giant upright elephant ear, is a species of flowering plant native to East and Southeast Asia. Traditionally, A. odora is sometime used as a medicine for the treatment of the common cold in Vietnam.

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<span class="mw-page-title-main">Cassava-based dishes</span> Foods prepared with cassava

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<i>Cyrtosperma merkusii</i> Species of flowering plant

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Xanthosoma brasiliense is a species of flowering plant in the Araceae. Common names include Tahitian spinach, tannier spinach, belembe, and Tahitian taro. It is one of several leaf vegetables used to make callaloo, and it may be called calalu in Puerto Rico.

<span class="mw-page-title-main">Arrowroot</span> Food starch

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Cocoyam is a tuberous root crop cultivated in many regions of South Asia. Cocoyams share many of the same nutritional and agricultural characteristics as potatoes and other root crops such as cassava and yams.

Xanthosoma caracu is a species of edible plant described by Karl Koch and Carl David Bouché. It is native to South America and cultivated in Puerto Rico.

References

  1. ↑ "Xanthosoma sagittifolium (L.) Schott". The Plant List. 2010. Retrieved 22 January 2017.
  2. ↑ "Xanthosoma sagittifolium (L.) Schott". World Flora Online. 2018. Retrieved 10 May 2022.
  3. ↑ "Xanthosoma sagittifolium (L.) Schott". Tropicos.org. Missouri Botanical Garden. Retrieved 10 May 2022.
  4. ↑ Onwueme, I. C.; Charles, W. B. (1994). Tropical root and tuber crops: production, perspectives and future prospects. FAO plant production and protection paper. FAO. Rome: FAO. ISBN   978-92-5-103461-3.
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  6. 1 2 Siqueira, M., Nascimento, W., Pedrosa, M., & Veasey, E. (2023). Agronomic characteristics (varieties or landraces) and potential of Xanthosoma sagittifolium as food and starch source. In M. P. Cereda & O. F. Vilpoux (Eds.), Varieties and Landraces (pp. 261–272). Academic Press. https://doi.org/10.1016/B978-0-323-90057-7.00010-3
  7. ↑ Nigel Maxted; B.V. Ford-Lloyd; J.G. Hawkes (2013). Plant Genetic Conservation: The in situ approach. Springer Science & Business Media. p. 309. ISBN   9789400914377 . Retrieved 3 October 2024.
  8. ↑ "Xanthosoma violaceum". Tropical Britain. Archived from the original on 2 February 2017. Retrieved 22 January 2017.
  9. ↑ "Xanthosoma violaceum from Tropical Britain - Purple Elephant's Ears". Tropical Britain. Retrieved 10 May 2022.
  10. 1 2 3 4 5 6 Boakye, Abena A.; Wireko-Manu, Faustina Dufie; Oduro, Ibok; Ellis, William O.; Gudjónsdóttir, María; Chronakis, Ioannis S. (June 2018). "Utilizing cocoyam (Xanthosoma sagittifolium) for food and nutrition security: A review". Food Science & Nutrition. 6 (4): 703–713. doi: 10.1002/fsn3.602 . ISSN   2048-7177. PMC   6021709 . PMID   29983932.
  11. 1 2 3 4 5 Siqueira, Marcos Vinicius Bohrer Monteiro; do Nascimento, Wellington Ferreira; Pedrosa, Marinalva Woods; Veasey, Elizabeth Ann (2023-01-01), Pascoli Cereda, Marney; François Vilpoux, Olivier (eds.), "Chapter 13 - Agronomic characteristics (varieties or landraces) and potential of Xanthosoma sagittifolium as food and starch source", Varieties and Landraces: Cultural Practices and Traditional Uses, vol. 2, Academic Press, pp. 261–272, ISBN   978-0-323-90057-7 , retrieved 2023-11-29
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  16. ↑ Chávez Jáuregui, Rosa N.; Vega, Ángel Bosques; Wessel-Beaver, Linda (2023-01-01), Pascoli Cereda, Marney; François Vilpoux, Olivier (eds.), "Chapter 14 - Yautía (Xanthosoma sagittifolium) in the food culture of Puerto Rico", Varieties and Landraces: Cultural Practices and Traditional Uses, vol. 2, Academic Press, pp. 273–287, ISBN   978-0-323-90057-7 , retrieved 2023-12-01
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  18. 1 2 de Almeida Jackix, Elisa; Monteiro, Elisa Bernardes; Raposo, Helena Fonseca; Amaya-Farfán, Jaime (2013-05-01). "Cholesterol reducing and bile-acid binding properties of taioba (Xanthosoma sagittifolium) leaf in rats fed a high-fat diet". Food Research International. 51 (2): 886–891. doi: 10.1016/j.foodres.2013.02.017 . ISSN   0963-9969.
  19. 1 2 Jehannara Calle; Nicola Gasparre; Yaiza Benavent-Gil; Cristina M. Rosell (2021). "Chapter Eight – Aroids as underexplored tubers with potential health benefits". Advances in Food and Nutrition Research. Vol. 97. Academic Press. pp. 319–359. doi:10.1016/bs.afnr.2021.02.018. ISBN   978-0-12-824580-4. PMID   34311903. S2CID   234955983.
  20. ↑ de Oliveira, Gisele Lopes; Holanda Cavalcanti Andrade, Laise de; Morais de Oliveira, Antonio Fernando (2012). "Xanthosoma sagittifolium and Laportea aestuans: Species used to prevent osteoporosis in Brazilian traditional medicine". Pharmaceutical Biology. 50 (7): 930–932. doi: 10.3109/13880209.2011.637054 . ISSN   1388-0209. PMID   22468879.
  21. ↑ "Xanthosoma sagittifolium - Plant Finder". www.missouribotanicalgarden.org. Retrieved 2024-05-22.
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  24. 1 2 3 Opara, L. U. (2003). Edible Aroids: Post-Harvest Operation. Massey University, Food and Agriculture Organization of the United Nations.
  25. ↑ Wada, E., Feyissa, T. & Tesfaye, K. (2019). Proximate, mineral and antinutrient contents of Cocoyam (Xanthosoma sagittifolium (L.) Schott) from Ethiopia. International journal of food science, 2019, 1–7. https://doi.org/10.1155/2019/8965476
  26. ↑ Siqueira, M. V. B. M., Nascimento, W. F. D., Pedrosa, M. W. & Veasey, E. A. (2023). Agronomic characteristics (varieties or landraces) and potential of Xanthosoma sagittifolium as food and starch source. In Elsevier eBooks (S. 261–272). https://doi.org/10.1016/b978-0-323-90057-7.00010-3
  27. ↑ Pacumbaba, R. P.; Wutoh, J. G.; Eyango, Sama Anne; Tambong, J. T.; Nyochembeng, L. M. (1992). "Isolation and Pathogenicity of Rhizosphere Fungi of Cocoyam in Relation to Cocoyam Root Rot Disease". Journal of Phytopathology. 135 (4): 265–273. doi:10.1111/j.1439-0434.1992.tb04312.x. ISSN   0931-1785.
  28. 1 2 Reddy, P. Parvatha; Parvatha Reddy, P. (2015). Plant protection in tropical root and tuber crops. New Delhi Heidelberg New York, NY Dordrecht London: Springer. ISBN   978-81-322-2388-7.
  29. ↑ "Genetic Improvement and Utilization of Major Under-utilized Crops in India", Breeding of Neglected and Under-Utilized Crops, Spices, and Herbs, CRC Press, pp. 269–316, 2007-01-06, doi:10.1201/9781482280548-22, ISBN   978-0-429-08329-7 , retrieved 2023-12-01
  30. 1 2 Wutoh, J.G.; Tambong, J.T.; Meboka, M.M.; Nzietchueng, S. (1994). "Field Evaluation of Cocoyam (Xanthosoma Sagittifolium (L) SCHOTT) For Tolerance to the Root Rot Disease caused by Pythium Myriotylum". Acta Horticulturae (380): 462–466. doi:10.17660/actahortic.1994.380.71. ISSN   0567-7572.
  31. 1 2 Onyeka, Joseph (2014). "Status of Cocoyam (Colocasia esculenta and Xanthosoma spp) in West and Central Africa: Production, Household Importance and the Threat from Leaf Blight. Lima (Peru). CGIAR Research Program on Roots, Tubers and Bananas (RTB)". CGIAR Research Program on Roots, Tubers and Bananas (RTB).
  32. ↑ REYES, G.; RÖNNBERG-WÄSTLJUNG, A. C.; NYMAN, M. (2006). "COMPARISON OF FIELD PERFORMANCE BETWEEN DASHEEN MOSAIC VIRUS-FREE AND VIRUS-INFECTED IN VITRO PLANTS OF COCOYAM ( XANTHOSOMA spp.) IN NICARAGUA". Experimental Agriculture. 42 (3): 301–310. doi:10.1017/s0014479706003590. ISSN   0014-4797. S2CID   85098812.
  33. ↑ Nelson, Scot C. (2008). "Dasheen Mosaic of Edible and Ornamental Aroids". Honolulu (HI): University of Hawaii. hdl:10125/12392.
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