North America Native Plant

Amamastla

Botanical name: Rumex chrysocarpus

USDA symbol: RUCH3

Life cycle: perennial

Habit: forb

Native status: Native to the lower 48 states  

Synonyms: Rumex berlandieri Meisn. (RUBE6)   

Amamastla: A Hidden Gem for Wetland Gardens Meet amamastla (Rumex chrysocarpus), a native southeastern United States plant that might not win any beauty contests but definitely deserves a spot in the right garden. This unassuming perennial forb is one of those quiet achievers of the plant world – working hard ...

Amamastla: A Hidden Gem for Wetland Gardens

Meet amamastla (Rumex chrysocarpus), a native southeastern United States plant that might not win any beauty contests but definitely deserves a spot in the right garden. This unassuming perennial forb is one of those quiet achievers of the plant world – working hard behind the scenes to support local wildlife while asking for very little in return.

What Exactly Is Amamastla?

Amamastla, also known by its scientific name Rumex chrysocarpus, is a native perennial forb that belongs to the dock family. As a forb, it’s essentially an herbaceous plant without woody stems – think of it as nature’s version of a soft-stemmed wildflower that comes back year after year. You might also see it listed under its botanical synonym, Rumex berlandieri, in some older plant guides.

Where Does It Call Home?

This southeastern native has made itself comfortable across Alabama, Florida, Louisiana, Mississippi, and Texas. It’s perfectly adapted to the warm, humid conditions of the Gulf Coast region and knows how to handle the occasional flood or drought that comes with the territory.

Why Your Garden Might (Or Might Not) Want Amamastla

Let’s be honest – amamastla isn’t going to stop traffic with its stunning blooms. Its small, inconspicuous flowers eventually develop into interesting golden-brown fruiting structures (hence the chrysocarpus which means golden fruit), but this plant is more about function than form.

The case FOR planting amamastla:

  • It’s a true native that supports local ecosystems
  • Provides food for birds and some browse for larger wildlife
  • Thrives in challenging wet conditions where other plants struggle
  • Extremely low maintenance once established
  • Perfect for naturalized or restoration areas

The case AGAINST planting amamastla:

  • Not particularly ornamental or showy
  • Better suited for wild areas than formal gardens
  • Can self-seed and spread in ideal conditions
  • Limited appeal for traditional landscape design

Perfect Garden Situations for Amamastla

Amamastla shines in specialized garden situations where its unique talents are appreciated. Think wetland restoration projects, rain gardens, or naturalized areas where you want to support native wildlife. It’s also excellent for those tricky boggy spots in your yard where more finicky plants throw in the towel.

This plant is ideal for gardeners interested in creating habitat for birds and other wildlife rather than picture-perfect flower displays. If you’re working on a prairie restoration or want to establish a low-maintenance native plant community, amamastla could be a valuable team player.

Growing Amamastla Successfully

The good news is that amamastla is refreshingly easy to grow – as long as you give it the wet conditions it craves.

Climate Requirements: Best suited for USDA hardiness zones 8-10, matching its native southeastern range.

Soil and Water: This plant has facultative wetland status, meaning it usually prefers wet conditions but can tolerate some drier periods. Think moist to consistently wet soils – it actually thrives in areas that stay soggy or even flood occasionally.

Light Requirements: Full sun to partial shade works well, though it tends to be happiest with at least some direct sunlight.

Planting Tips: Amamastla is quite forgiving and will often establish itself from seed. If you’re planting it intentionally, choose a spot with reliable moisture and don’t worry too much about soil type – it’s pretty adaptable.

Wildlife Benefits

While amamastla might not be the star of your wildlife buffet, it definitely contributes to the local ecosystem. According to research, it provides a modest but consistent food source for various animals:

  • Birds incorporate it into about 5-10% of their diet
  • Larger animals browse it occasionally (though it makes up only 2-5% of their diet)
  • The seeds provide food for various bird species
  • It offers some cover, though animals don’t rely on it heavily for shelter

The Bottom Line

Amamastla isn’t for every garden or every gardener. If you’re looking for showy blooms or formal garden appeal, you’ll want to look elsewhere. But if you’re passionate about native plants, interested in supporting local wildlife, or dealing with consistently wet garden areas, this humble southeastern native might be exactly what you need.

Remember, not every plant needs to be a showstopper. Sometimes the most valuable plants are the quiet ones that keep the ecosystem humming along smoothly – and amamastla does exactly that.

Wildlife Status

Want to attract wildlife or keep hungry critters away from your garden? Understanding the relationship between plants and wildlife is key. While plant tags may indicate deer and rabbit resistance, they don't tell the full story. Every gardener has experienced the disappointment of purchasing "deer-resistant" plants only to find them nibbled to the ground!

The extent to which plants are resistant to animal browsing is a matter of degree. Likewise, the extent to which a plant attracts wanted visitors also varies. Whether you want a garden full or free of wildlife, learning about interactions between a plant and wild animals can help you make smarter choices for the garden you desire.

As shown below Shrubby Indian Mallow isn't a large food source for animals or birds. You can confidently add this plant to your garden and rest assured knowing it's unlikely to be devoured by four-legged visitors.

Small animals

not a food source

not a source of cover

Large animals

2-5% of diet

Sparsely used as cover

Terrestrial birds

5-10% of diet

Infrequently used as cover

Water birds

not a food source

not a source of cover

Sources:

Everitt, J.H., D.L. Drawe, and R.I. Lonard. 1999. Field guide to the broad leaved herbaceous plants of South Texas used by livestock and wildlife. Texas Tech University Press. Lubbock.

Amamastla

Classification

Group

Dicot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Magnoliopsida - Dicotyledons

Subclass

Caryophyllidae

Order

Polygonales

Family

Polygonaceae Juss. - Buckwheat family

Genus

Rumex L. - dock

Species

Rumex chrysocarpus Moris - amamastla

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