Tannia (Xanthosoma sagittifolium), also known as malanga, yautía, or cocoyam, is a tropical aroid in the Araceae family producing large, starchy corms that are a dietary staple for millions across the tropics. Second only to cassava and yam in importance as a tropical root crop, tannia's edible corms and young leaves must be thoroughly cooked to destroy calcium oxalate crystals that make all raw parts of the plant intensely irritating and toxic.
• One of the most important root crops in the humid tropics, feeding millions worldwide
• Known by many names: malanga (Spanish Caribbean), yautía (Dominican Republic), cocoyam (West Africa), and dasheen (some Caribbean islands)
• The leaves are also edible when cooked and are used as a vegetable in many tropical cuisines
• Closely related to taro (Colocasia esculenta) but generally prefers drier growing conditions
• The genus name Xanthosoma means "yellow body," referencing the yellowish sap in some species
Native to tropical America, specifically the lowland regions of northern South America and Central America.
• Originated in the Amazon basin and Orinoco basin of northern South America
• Domesticated by indigenous peoples approximately 5,000 to 7,000 years ago
• Was a major food crop of the Arawak and Carib peoples of the Caribbean and northern South America
• Introduced to West Africa during the transatlantic slave trade in the 16th to 18th centuries
• Now widely cultivated throughout tropical Africa, where it has become a major staple
• Also grown across the Caribbean, Pacific islands, and tropical Asia
• Sometimes called "new cocoyam" to distinguish it from taro ("old cocoyam")
• Originated in the Amazon basin and Orinoco basin of northern South America
• Domesticated by indigenous peoples approximately 5,000 to 7,000 years ago
• Was a major food crop of the Arawak and Carib peoples of the Caribbean and northern South America
• Introduced to West Africa during the transatlantic slave trade in the 16th to 18th centuries
• Now widely cultivated throughout tropical Africa, where it has become a major staple
• Also grown across the Caribbean, Pacific islands, and tropical Asia
• Sometimes called "new cocoyam" to distinguish it from taro ("old cocoyam")
Tannia is a large, robust perennial herb with dramatic elephant-ear foliage.
Leaves:
• Large, sagittate (arrowhead-shaped) to hastate, typically 40 to 100 cm long and 25 to 60 cm wide
• Dark green, glossy, with prominent peltate venation
• Held on stout, erect petioles 60 to 150 cm tall
• Petioles are green, sometimes with purple or dark streaks
• Unlike taro, the petiole attachment point is on the upper surface of the leaf blade, not at the center (peltate vs. sagittate attachment)
Corms:
• Large, cylindrical to irregularly shaped main corm (cormel), 15 to 30 cm long
• Produces smaller side cormels (tubers) around the main corm
• Skin is brown, rough, and covered with root scars
• Flesh color varies from white to cream to yellow or pink, depending on cultivar
• Starchy texture similar to potato when cooked
Flowers:
• Typical aroid spathe and spadix inflorescence
• Pale yellow to cream spathe, 15 to 25 cm long
• Flowering is uncommon in most cultivated varieties
Plant Size:
• Total height 1 to 2 meters
• Forms clumps from the numerous produced cormels
Leaves:
• Large, sagittate (arrowhead-shaped) to hastate, typically 40 to 100 cm long and 25 to 60 cm wide
• Dark green, glossy, with prominent peltate venation
• Held on stout, erect petioles 60 to 150 cm tall
• Petioles are green, sometimes with purple or dark streaks
• Unlike taro, the petiole attachment point is on the upper surface of the leaf blade, not at the center (peltate vs. sagittate attachment)
Corms:
• Large, cylindrical to irregularly shaped main corm (cormel), 15 to 30 cm long
• Produces smaller side cormels (tubers) around the main corm
• Skin is brown, rough, and covered with root scars
• Flesh color varies from white to cream to yellow or pink, depending on cultivar
• Starchy texture similar to potato when cooked
Flowers:
• Typical aroid spathe and spadix inflorescence
• Pale yellow to cream spathe, 15 to 25 cm long
• Flowering is uncommon in most cultivated varieties
Plant Size:
• Total height 1 to 2 meters
• Forms clumps from the numerous produced cormels
Tannia corms are a significant source of carbohydrates and energy in tropical diets.
• Per 100 g cooked corm: approximately 120 to 140 kcal
• High in complex carbohydrates (approximately 28 to 32 g per 100 g)
• Moderate dietary fiber content (approximately 4 to 5 g per 100 g)
• Low in fat and protein (approximately 1.5 to 2 g protein per 100 g)
• Good source of potassium (approximately 500 mg per 100 g)
• Contains phosphorus, magnesium, and small amounts of calcium and iron
• Provides vitamin C, vitamin E, and small amounts of B vitamins
• Contains some zinc and manganese
• The leaves, when cooked, are rich in vitamin A, vitamin C, iron, and protein
• Gluten-free and hypoallergenic — suitable for people with grain allergies
• Per 100 g cooked corm: approximately 120 to 140 kcal
• High in complex carbohydrates (approximately 28 to 32 g per 100 g)
• Moderate dietary fiber content (approximately 4 to 5 g per 100 g)
• Low in fat and protein (approximately 1.5 to 2 g protein per 100 g)
• Good source of potassium (approximately 500 mg per 100 g)
• Contains phosphorus, magnesium, and small amounts of calcium and iron
• Provides vitamin C, vitamin E, and small amounts of B vitamins
• Contains some zinc and manganese
• The leaves, when cooked, are rich in vitamin A, vitamin C, iron, and protein
• Gluten-free and hypoallergenic — suitable for people with grain allergies
WARNING: Raw tannia corms and leaves contain calcium oxalate crystals and are TOXIC. All parts must be thoroughly cooked before consumption.
Toxic Compounds:
• Calcium oxalate raphides (needle-shaped crystals) embedded in plant tissue
• These microscopic crystals puncture mucous membranes, causing intense burning, swelling, and irritation of the mouth, throat, and digestive tract
• Raw consumption can cause severe pain, difficulty swallowing, and in extreme cases, airway obstruction
Safe Preparation:
• Boiling, baking, roasting, or frying completely destroys the calcium oxalate crystals
• Minimum cooking time of 15 to 20 minutes of boiling is recommended
• Peel corms before or after cooking (peeling after cooking may reduce exposure to crystals)
• Young leaves should be boiled for at least 15 minutes before eating
• Some cultivars have lower oxalate levels than others
• Cooking water should be discarded
Toxic Compounds:
• Calcium oxalate raphides (needle-shaped crystals) embedded in plant tissue
• These microscopic crystals puncture mucous membranes, causing intense burning, swelling, and irritation of the mouth, throat, and digestive tract
• Raw consumption can cause severe pain, difficulty swallowing, and in extreme cases, airway obstruction
Safe Preparation:
• Boiling, baking, roasting, or frying completely destroys the calcium oxalate crystals
• Minimum cooking time of 15 to 20 minutes of boiling is recommended
• Peel corms before or after cooking (peeling after cooking may reduce exposure to crystals)
• Young leaves should be boiled for at least 15 minutes before eating
• Some cultivars have lower oxalate levels than others
• Cooking water should be discarded
Tannia is a relatively low-maintenance tropical root crop.
Planting:
• Propagated from cormels (small side tubers) or the top portion of the main corm
• Plant 7 to 10 cm deep in prepared mounds or ridges
• Space 60 to 90 cm apart in rows 90 to 120 cm apart
• Plant at the beginning of the rainy season
Growing:
• Thrives in hot, humid tropical conditions with 1,500 to 3,000 mm annual rainfall
• Prefers partial shade to full sun; benefits from shade during the hottest part of the day
• Requires fertile, moist, well-drained soils rich in organic matter
• More drought-tolerant than taro once established
• Takes 8 to 12 months from planting to harvest
• Hill up soil around the base as plants grow to encourage cormel development
Harvest:
• Harvest when lower leaves begin to yellow and die back, 8 to 12 months after planting
• Dig carefully around the base to harvest cormels without damaging the main corm
• Small cormels can be harvested progressively while leaving the plant to produce more
• Yields of 7 to 15 tonnes per hectare are typical
• Store cormels in a cool, dry, well-ventilated place for 1 to 3 months
Planting:
• Propagated from cormels (small side tubers) or the top portion of the main corm
• Plant 7 to 10 cm deep in prepared mounds or ridges
• Space 60 to 90 cm apart in rows 90 to 120 cm apart
• Plant at the beginning of the rainy season
Growing:
• Thrives in hot, humid tropical conditions with 1,500 to 3,000 mm annual rainfall
• Prefers partial shade to full sun; benefits from shade during the hottest part of the day
• Requires fertile, moist, well-drained soils rich in organic matter
• More drought-tolerant than taro once established
• Takes 8 to 12 months from planting to harvest
• Hill up soil around the base as plants grow to encourage cormel development
Harvest:
• Harvest when lower leaves begin to yellow and die back, 8 to 12 months after planting
• Dig carefully around the base to harvest cormels without damaging the main corm
• Small cormels can be harvested progressively while leaving the plant to produce more
• Yields of 7 to 15 tonnes per hectare are typical
• Store cormels in a cool, dry, well-ventilated place for 1 to 3 months
Tannia is a versatile root crop central to Caribbean, West African, and tropical American cuisines.
Culinary Uses (always cook thoroughly):
• Boiled and mashed as a starchy staple, similar to mashed potatoes
• Fried into chips, fries, or fritters — popular in the Caribbean and West Africa
• Added to soups and stews as a thickening agent
• In Puerto Rico and Dominican Republic, "pasteles" are made from grated tannia filled with meat
• In West Africa, pounded into "fufu" — a starchy dough eaten with soups
• Roasted or baked as a side dish
• Ground into flour for baking and porridge
• Young leaves boiled and eaten as a vegetable, similar to spinach (called "callaloo" in some Caribbean islands)
Other Uses:
• Used in livestock feed when properly processed
• The large leaves used as wrappers for food
• Ornamental value as a landscape plant for tropical gardens
• Used in agroforestry systems as an understory crop
Culinary Uses (always cook thoroughly):
• Boiled and mashed as a starchy staple, similar to mashed potatoes
• Fried into chips, fries, or fritters — popular in the Caribbean and West Africa
• Added to soups and stews as a thickening agent
• In Puerto Rico and Dominican Republic, "pasteles" are made from grated tannia filled with meat
• In West Africa, pounded into "fufu" — a starchy dough eaten with soups
• Roasted or baked as a side dish
• Ground into flour for baking and porridge
• Young leaves boiled and eaten as a vegetable, similar to spinach (called "callaloo" in some Caribbean islands)
Other Uses:
• Used in livestock feed when properly processed
• The large leaves used as wrappers for food
• Ornamental value as a landscape plant for tropical gardens
• Used in agroforestry systems as an understory crop
Wusstest du schon?
Tannia is so central to Dominican cuisine that the country produces over 50 different varieties of yautía, each with its own name, flavor profile, and preferred cooking method — making the Dominican Republic one of the world's greatest repositories of tannia genetic diversity.
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