SafePlants

Spreading Amaranth

Spreading amaranth is a common name applied to several species within the Amaranthus genus. This annual plant is often found in disturbed areas and can be both native and introduced to various regions.

Considerations for Pets

• The text mentions the plant's presence as a weed and its ability to spread rapidly. This could indicate a potential for widespread presence in gardens and outdoor areas frequented by pets.

Considerations for Children

• The text refers to it as a weed that spreads quickly. This might mean it is commonly found in gardens and outdoor spaces where children play.

Scientific Name and Common Names

• Scientific Name: While several species are mentioned, Amaranthus blitoides is noted as the "Preferred Scientific Name". Amaranthus crassipes and Amaranthus deflexus are also mentioned.
• Common Name: Spreading amaranth
• Other common names mentioned include: Clubfoot amaranth, tropical spreading amaranth

Taxonomy and Nomenclature

• Domain: Eukaryota
• Synonyms/Alternative Names: Amaranthus gracilis, Amaranthus crassipes var. warnockii, A. warnockii

Distribution and Habitat

• Spreading amaranth is both native and introduced in the United States.
• It is often found in disturbed areas.

Ecological Role

• Several references indicate spreading amaranth, particularly Palmer amaranth (Amaranthus palmeri), is an aggressive and fast-spreading weed that can be problematic in agricultural settings.
• Wildlife, waterfowl (ducks and geese), and even contaminated farm equipment (combines, cattle manure) are mentioned as vectors for seed dispersal, leading to its spread into new areas.
• It is mentioned as threatening crop systems and severely reducing yields if not controlled early.

Morphological Characteristics and Growth Habits

• Amaranthus graecizans, a related species, is described as an annual growing to 0.5 m (1ft 8in).
• Spreading amaranth is generally described as a prostrate (spreading along the ground) weed.
• Leaves are alternate, simple, and petioled.
• Flowers are greenish or green and the flowering period is in the summer.
• Amaranthus palmeri plants are either male or female (dioecious).

Interactions with Other Organisms

• Palmer amaranth can spread resistance genes through both pollen and seed.
• Seeds are spread by birds and waterfowl.

Further Information

• Discover Life has pages dedicated to the biology, natural history, ecology, identification, and distribution of Amaranthus crassipes.
• The Australian Plant Census is mentioned as a data link.
• Dave's Garden is referenced as a community for sharing gardening tips.