Non-native Plants

Amaranthus Acutilobus

Amaranthus acutilobus

USDA symbol: AMAC6

If you’ve stumbled across the name Amaranthus acutilobus in your plant research, you might be scratching your head wondering what exactly this species is all about. You’re not alone! This particular member of the amaranth family is something of an enigma in the gardening world. Amaranthus acutilobus belongs to the ...

Amaranthus acutilobus: The Mystery Plant of the Amaranth Family

If you’ve stumbled across the name Amaranthus acutilobus in your plant research, you might be scratching your head wondering what exactly this species is all about. You’re not alone! This particular member of the amaranth family is something of an enigma in the gardening world.

What We Know (And Don’t Know)

Amaranthus acutilobus belongs to the amaranth family, a group that includes many well-known edible and ornamental plants. However, this specific species is shrouded in mystery. Unlike its more famous cousins like love-lies-bleeding or grain amaranth, information about this plant is remarkably scarce.

The species has at least one historical synonym – Euxolus emarginatus – which suggests it may have undergone taxonomic changes over the years. This kind of name shuffling often happens in botany as scientists better understand plant relationships.

Geographic Distribution

Unfortunately, the geographic distribution of Amaranthus acutilobus is not well documented in available sources. Without clear information about where this plant naturally occurs, it’s impossible to determine its native range or whether it might be suitable for your local climate.

Should You Grow It?

Here’s where things get tricky. With so little reliable information available about Amaranthus acutilobus, it’s difficult to recommend it for home gardens. We don’t know:

  • Its growth habits or mature size
  • Preferred growing conditions
  • Whether it’s native to North America
  • Its invasive potential
  • Benefits to wildlife or pollinators
  • Appropriate USDA hardiness zones

Better Amaranth Alternatives

If you’re interested in growing amaranths, consider these better-documented species instead:

  • Amaranthus palmeri (Palmer’s amaranth) – if you’re in its native southwestern range
  • Amaranthus retroflexus (Redroot pigweed) – widely native across North America
  • Amaranthus blitoides (Prostrate pigweed) – native to western North America
  • Amaranthus powellii (Powell’s amaranth) – native to southwestern United States

The Bottom Line

Sometimes in the plant world, mystery doesn’t equal desirability. Without clear information about Amaranthus acutilobus – its origins, growing requirements, or potential impacts – it’s best to choose better-known amaranth species for your garden. Stick with well-documented native plants that you can grow with confidence, knowing they’ll provide clear benefits to your local ecosystem.

If you’re a botanical researcher or have reliable information about this species, the gardening community would certainly benefit from more documentation about this mysterious amaranth!

Amaranthus acutilobus is also known as...

Often we refer to plants by their common names. When shopping for plants the scientific name is the best way to positively identify the plant species you desire. But some plants have more than one name! While it doesn't happen often, nurseries might display one name while you're searching for another. Amaranthus acutilobus is also known as:

Euxolus emarginatus Braun & Bouché | USDA symbol: EUEM2

Why do some plants have more than one name? Over time plant species may be renamed for a few reasons:

  1. Botanists in different regions named the same plant without knowing it had already been classified.
  2. A species was reclassified after scientific advances in, for example, DNA analysis.
  3. Slight variations within a species are sometimes mistakenly identified as entirely new species.

Classification

Group: Dicot
Kingdom: Plantae - Plants
Subkingdom: Tracheobionta - Vascular plants
Superdivision: Spermatophyta - Seed plants
Division: Magnoliophyta - Flowering plants
Class: Magnoliopsida - Dicotyledons
Subclass: Caryophyllidae
Order: Caryophyllales
Family: Amaranthaceae Martinov - Amaranth family
Genus: Amaranthus L. - pigweed

Species: Amaranthus acutilobus Uline & Bray [excluded]

Plant data source: USDA, NRCS 2025. The PLANTS Database. https://plants.usda.gov,. 2/25/2025. National Plant Data Team, Greensboro, NC USA