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roughfruit amaranth

Scientific Name: Amaranthus tuberculatus

Family: Amaranthaceae

Category: Dicot

Growth: Forb/herb

Duration: Annual

Other Names:

       

Amaranthus tuberculatus: Tall Waterhemp, Rough-Fruit Amaranth

Amaranthus tuberculatus, commonly known as tall waterhemp or rough-fruit amaranth, is a species of flowering plant belonging to the Amaranthaceae family. This summer annual broadleaf is noted for its rapid growth and potential to become weedy in certain environments.

Considerations for Pets

  • The inflorescence of Amaranthus tuberculatus is noted to have a stiff, rough texture.
  • The plant matures to produce small, dry fruits (capsules), each containing a single seed.

Considerations for Children

  • The inflorescence of Amaranthus tuberculatus is noted to have a stiff, rough texture.
  • The plant matures to produce small, dry fruits (capsules), each containing a single seed.

Taxonomy and Nomenclature

  • Scientific Name: Amaranthus tuberculatus (Moq.) J. D. Sauer
  • Genus: Amaranthus
  • Species: tuberculatus
  • Family: Amaranthaceae
  • Synonym: Euxolus muricatus (Amaranthus muricatus) and Acnida tuberculata Moquin-Tandon in A. P. de Candolle and A. L. P. P. de Candolle, Prodr.
  • Subspecies: Amaranthus tuberculatus var. rudis

Common Names

  • Tall Waterhemp
  • Rough-Fruit Amaranth
  • Roughfruit Amaranth
  • Tall Amaranth
  • Rough-fruited water-hemp
  • Inland Water Hemp
  • Western Waterhemp

Distribution and Habitat

Amaranthus tuberculatus is often found in wetland habitats. It originated in the eastern United States.

Morphological Characteristics

  • Amaranthus tuberculatus is an annual dioecious herb, typically growing to a height of 1-2 meters.
  • Female flowers mature into a dry fruit (capsule) containing a single, small seed (0.04-0.05").
  • The inflorescence has a stiff, rough texture.

Traditional Uses

Culturally, the amaranth flower has been used as a symbol of immortality.

Further Information

  • Discover Life offers a page about the biology, natural history, ecology, identification, and distribution of Amaranthus muricatus (Rough-fruit Amaranth).
  • The USDA-NRCS PLANTS Database provides information and photos of Amaranthus rudis.