North America Native Plant

Gaping Grass

Botanical name: Steinchisma hians

USDA symbol: STHI3

Life cycle: perennial

Habit: grass

Native status: Native to the lower 48 states  

Synonyms: Panicum hians Elliott (PAHI11)   

Gaping Grass: A Hidden Gem for Wetland Gardens Ever heard of gaping grass? If you haven’t, you’re not alone! This native perennial grass, scientifically known as Steinchisma hians, is one of those unsung heroes of the plant world that deserves more recognition from native plant enthusiasts and wetland gardeners. Meet ...

Gaping Grass: A Hidden Gem for Wetland Gardens

Ever heard of gaping grass? If you haven’t, you’re not alone! This native perennial grass, scientifically known as Steinchisma hians, is one of those unsung heroes of the plant world that deserves more recognition from native plant enthusiasts and wetland gardeners.

Meet Gaping Grass

Gaping grass is a true American native, belonging to the grass family and classified as a graminoid (that’s botanist-speak for grass-like plants). Like many native grasses, it has had a bit of an identity crisis over the years – you might find it listed under its old name, Panicum hians, in some older gardening references.

Where Does Gaping Grass Call Home?

This adaptable grass has quite an impressive range across the lower 48 states. You’ll find gaping grass thriving naturally in Alabama, Arkansas, Florida, Georgia, Illinois, Louisiana, Mississippi, Missouri, New Mexico, North Carolina, Oklahoma, South Carolina, Tennessee, Texas, and Virginia. That’s a pretty impressive resume for a grass that most people have never heard of!

The Wetland Connection

Here’s where gaping grass really shines – it’s a wetland specialist! Depending on where you live, this grass has different relationships with water:

  • In the Atlantic and Gulf Coastal Plain, it’s practically married to wetlands (obligate wetland status)
  • In the Arid West, Eastern Mountains and Piedmont, Great Plains, and Midwest regions, it usually prefers wet feet but can tolerate some drier conditions (facultative wetland status)

This flexibility makes it a valuable plant for gardeners dealing with varying moisture conditions.

Why Consider Gaping Grass for Your Garden?

While gaping grass might not win any flashy flower contests, it brings some serious practical benefits to the table:

  • Native credentials: As a true native, it supports local ecosystems without any invasive tendencies
  • Wetland warrior: Perfect for rain gardens, bioswales, or naturally wet areas in your landscape
  • Low maintenance: Once established, native grasses typically require minimal care
  • Erosion control: Grass roots are excellent at holding soil in place, especially in wet areas

The Challenge: Finding Gaping Grass

Here’s the catch – gaping grass isn’t exactly flying off the shelves at your local garden center. This lesser-known native can be tricky to source, which is unfortunate given its ecological value. You’ll likely need to contact specialized native plant nurseries or native seed suppliers in your region.

Growing Gaping Grass Successfully

Based on its natural habitat preferences, here’s what gaping grass likely needs to thrive in your garden:

  • Moisture: Consistent moisture to wet conditions – think rain garden or pond edge
  • Sun exposure: Probably full sun to partial shade (typical for most native grasses)
  • Soil: Adaptable, but probably prefers soils that stay moist
  • Climate zones: Likely hardy in USDA zones 6-10, based on its natural range

Best Uses in the Landscape

Gaping grass isn’t the star of a formal perennial border, but it could be perfect for:

  • Rain gardens and bioswales
  • Naturalized wetland areas
  • Pond or stream margins
  • Native plant restorations
  • Wildlife habitat gardens

The Bottom Line

Should you plant gaping grass? If you have a wet area in your landscape and want to support native biodiversity, absolutely! Just be prepared to do some detective work to find it. This grass represents the kind of humble, hardworking native that forms the backbone of healthy ecosystems – not flashy, but incredibly valuable.

While you’re hunting for gaping grass, consider it an opportunity to discover other native wetland grasses that might be more readily available in your area. Your local native plant society or extension office can help you identify similar natives that might be easier to source while you continue your search for this particular hidden gem.

Wetland Status

The rule of seasoned gardeners and landscapers is to choose the "right plant for the right place" matching plants to their ideal growing conditions, so they'll thrive with less work and fewer inputs. But the simplicity of this catchphrase conceals how tricky plant selection is. While tags list watering requirements, there's more to the story.

Knowing a plant's wetland status can simplify the process by revealing the interaction between plants, water, and soil. Surprisingly, many popular landscape plants are wetland species! And what may be a wetland plant in one area, in another it might thrive in drier conditions. Also, it helps you make smarter gardening choices and grow healthy plants with less care and feeding, saving you time, frustration, and money while producing an attractive garden with greater ecological benefits.

Regions
Status
Moisture Conditions

Arid West

FACW

Facultative Wetland - Plants with this status usually occurs in wetlands but may occur in non-wetlands

Atlantic and Gulf Coastal Plain

OBL

Obligate Wetland - Plants with this status almost always occurs in wetlands

Eastern Mountains and Piedmont

FACW

Facultative Wetland - Plants with this status usually occurs in wetlands but may occur in non-wetlands

Great Plains

FACW

Facultative Wetland - Plants with this status usually occurs in wetlands but may occur in non-wetlands

Midwest

FACW

Facultative Wetland - Plants with this status usually occurs in wetlands but may occur in non-wetlands

Gaping Grass

Classification

Group

Monocot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Liliopsida - Monocotyledons

Subclass

Commelinidae

Order

Cyperales

Family

Poaceae Barnhart - Grass family

Genus

Steinchisma Raf. - gaping grass

Species

Steinchisma hians (Elliott) Nash - gaping grass

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