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Riverbank Wild-rye

Elymus riparius

Found in moist forests. Weakley, Flora of the Southeastern United States (2025), Northern Tier edition What its natural habitat tells you

48
Good

Native to Virginia. How scores work Is it native here?

Profile 100%

Height
About 4.5 feet
Light
Part shade, Shade
Soil moisture
Average to moist
Will it fit your yard?

At a glance

Bloom
July to September
Fruiting season
Summer to fall

Not yet recorded · Spread · Life cycle · Leaves

Recorded in 69 Virginia counties.

Natural habitats

Places it grows wild. Not a planting requirement. Each habitat page lists the plants and wildlife also found there.

Moist forests

Shortia beneath rhododendrons in mountain woodland
Regional / representative. Shown: Mountains of North and South Carolina; exact site not identified, a neighboring state.Shortia beneath rhododendrons in mountain woodland, Marian Ellis Rowan, 1901. Public domain. Source record.

All habitats

Also found with this plant

Wildlife whose habitat models include habitats this plant grows in, in Virginia. Shared habitat, not food. 127 animals.

All wildlife of Virginia

Ecological relationships

Who uses this plant?

What these records mean

26CaterpillarsGenus host records with ranges including VA

Genus host records with ranges including VA · Elymus

  • Amblyscirtes vialisCommon Roadside-Skipper, Black Little Skipper
  • Ancyloxypha numitorLeast Skipper
  • Apamea devastatorGlassy Borer, Glassy Cutworm Moth
  • Apamea lignicoloraWood-Colored Apamea
  • Apamea sordensBordered Apamea, Rustic Shoulder-Knot
  • Cercyonis pegalaCommon Wood Nymph
  • Clepsis persicanaWhite Triangle Tortrix
  • Dargida diffusaWheat Head Armywotm Moth
  • Hydraecia immanisHop Borer, Hop Vine Borer
  • Lethe anthedonNorthern Pearly Eye
Show all 26
  • Leucania commoidesDusky Wainscot, Comma Wainscot
  • Leucania insuetaDarted Wainscot, Heterodox Wainscot
  • Leucania phragmitidicolaNeedle Wainscot, Phragmites Wainscot
  • Leucania pseudargyriaFalse Wainscot
  • Limochores mysticLong Dash
  • Lon zabulonZabulon Skipper
  • Loscopia velataVeiled Ear Moth, Veiled Grass Moth
  • Mythimna unipunctaArmyworm Moth, White Speck
  • Nephelodes miniansBronzed Cutworm
  • Papaipema cataphractaBurdock Border, Potato-Stalk Borer
  • Papaipema nebrisStalk Borer
  • Polites themistoclesTawny-Edged Skipper
  • Pyrrharctia isabellaIsabella Tiger Moth, Banded Woolybear
  • Spodoptera frugiperdaFall Armyworm Moth
  • Apamea lutosa
  • Elachista illectella
Shropshire & Tallamy 2025, Lepidoptera of North America north of Mexico, ZooKeys 1261 (ODbL)
0BeesSoutheastern regional records
0Specialist beesPollen specialists
4BirdsRecorded genus food-resource interactions; not a state feeding claim

Recorded genus food-resource interactions; not a state feeding claim · Elymus

  • Alectoris chukarChukar
  • Anser albifronsGreater White-fronted Goose
  • Perdix perdixGray Partridge
  • Plectrophenax nivalisSnow Bunting
Hurlbert, Olsen, Sawyer & Winner 2021, Avian Diet Database, Scientific Data 8: 260 (CC0)

Direct food only: birds recorded eating this genus across North America. Caterpillars on host plants also feed nesting birds. NC Native Plant Society: butterfly gardening

No records yet · Ants · Beetles · Flies · Adult butterflies / moths · Other wasps · Other insects

Growing and identification

Plant details

Family
Poaceae
Flower color
Yellow
Growth rate
Moderate
Growth habit
Grows in clumps
Foliage color
Dark green
Fruit begins
Summer
Fruit ends
Fall

Safety has not been reviewed for this plant; check toxicity and thorns before planting.

Growing sources and scope
  • Bloom · “July to September” · Weakley, Flora of the Southeastern United States (2025), Carolinas & Georgia edition (ranked first; USDA PLANTS, Prairie Moon 2026 Cultural Guide differ) · Carolinas and Georgia
  • Flower color · “Yellow” · USDA PLANTS · Nationwide species characteristics; local growing conditions may vary
  • Foliage color · “Dark green” · USDA PLANTS · Nationwide species characteristics; local growing conditions may vary
  • Fruit begins · “Summer” · USDA PLANTS · Nationwide species characteristics; local growing conditions may vary
  • Fruit ends · “Fall” · USDA PLANTS · Nationwide species characteristics; local growing conditions may vary
  • Growth habit · “Grows in clumps” · USDA PLANTS · Nationwide species characteristics; local growing conditions may vary
  • Growth rate · “Moderate” · USDA PLANTS · Nationwide species characteristics; local growing conditions may vary
  • Height · “About 4.5 feet” · USDA PLANTS (ranked first; Prairie Moon 2026 Cultural Guide differs) · Nationwide species characteristics; local growing conditions may vary
  • Light · “Part shade (3–6 hours); Shade (under 3 hours)” · Prairie Moon 2026 Cultural Guide · Nursery cultural guide; height in flower; moisture categories retained as printed
  • Soil · “Wet-mesic; Mesic” · Prairie Moon 2026 Cultural Guide · Nursery cultural guide; height in flower; moisture categories retained as printed
Also known as

Eastern Riverbank Wild Rye; Riverbank Wild rye

Conservation status

Virginia rankS5
Global rankG5
VA statusNot verified
Federal statusNot verified

Conservation source Global and federal source

In your garden

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Sources