Giant pigweed
Triantherma portulacastrum
Trianthema portulacastrum, commonly known as horse purslane, black pigweed, or giant pigweed, is a succulent, annual herb belonging to the family Aizoaceae. Native to tropical and subtropical regions, it is widespread in many parts of the world. Here's a brief overview:
Botanical Description:
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Growth Form:
- Horse purslane is a succulent herb.
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Height:
- It typically grows to a height of about 15 to 60 centimeters (6 to 24 inches).
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Leaves:
- The leaves are succulent, obovate to elliptic, and may have a reddish tint. They are arranged alternately along the stems.
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Stems:
- The stems are fleshy and may sprawl or trail along the ground.
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Flowers:
- The flowers are small, inconspicuous, and often greenish-white. They are borne in clusters.
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Fruit:
- The fruit is a capsule containing numerous small seeds.
Identification Tips:
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Succulent Leaves:
- The succulent, obovate to elliptic leaves are characteristic.
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Trailing Stems:
- The fleshy stems may sprawl or trail along the ground.
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Small Flowers:
- The flowers are not showy, typically greenish-white.
Habitat:
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Distribution:
- Native to tropical and subtropical regions, it has become naturalized in various parts of the world.
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Habitat:
- Commonly found in disturbed areas, sandy soils, and along roadsides.
Ecological Role:
- Pioneer Species:
- Like many succulent plants, horse purslane can be a pioneer species in disturbed areas, contributing to soil stabilization.
Uses:
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Edible:
- In some cultures, young leaves of horse purslane are consumed as a vegetable.
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Traditional Medicine:
- It has been used in traditional medicine in certain regions.
Caution:
- Invasiveness:
- Horse purslane can be invasive in certain ecosystems, and its spread should be monitored.
Note:
- Similar Species:
- The Aizoaceae family includes several succulent species, and proper identification may require attention to specific characteristics.










