Grassleaf Rush
Juncus marginatus
Found in wet meadows, bogs, generally throughout in wet, sandy or peaty soil. FloraQuest, phone app (app page) What its natural habitat tells you
Native to Virginia. How scores work Is it native here?
Profile 94%
- Height
- About 2 feet
- Light
- Partial shade, Full sun
- Soil moisture
- Moist to wet
No photograph yet. Looking for an old drawing…
At a glance
- Bloom
- June to September
- Fruiting season
- Summer
Not yet recorded · Spread · Life cycle · Leaves
Recorded in 93 Virginia counties.
Natural habitats
Places it grows wild. Not a planting requirement. Each habitat page lists the plants and wildlife also found there.
Open, wet, grassy or sedgy ground that is not a bog.
Also found with this plant
Wildlife whose habitat models include habitats this plant grows in, in Virginia. Shared habitat, not food. 118 animals.
- Brown CreeperCerthia americana
- Brown ThrasherToxostoma rufum
- Brown-headed CowbirdMolothrus ater
- Canada GooseBranta canadensis
- Carolina ChickadeePoecile carolinensis
- Carolina WrenThryothorus ludovicianus
- Cedar WaxwingBombycilla cedrorum
- Cerulean WarblerDendroica cerulea
- Chimney SwiftChaetura pelagica
- Chipping SparrowSpizella passerina
- Cliff SwallowPetrochelidon pyrrhonota
- Common GrackleQuiscalus quiscula
- Common NighthawkChordeiles minor
- Common RavenCorvus corax
- Common YellowthroatGeothlypis trichas
- Cooper's HawkAccipiter cooperii
- Double-crested CormorantPhalacrocorax auritus
- Downy WoodpeckerPicoides pubescens
- Eastern KingbirdTyrannus tyrannus
- Eastern PhoebeSayornis phoebe
- Eastern Screech-owlMegascops asio
- Eastern TowheePipilo erythrophthalmus
- Eastern Wood-peweeContopus virens
- Eurasian Collared-doveStreptopelia decaocto
Who uses this plant?
8CaterpillarsGenus host records with ranges including VA
Genus host records with ranges including VA · Juncus
- Acronicta insularisHenry's Marsh Moth, Cattail Caterpillar
- Bactra furfuranaRush Bactra
- Bactra verutanaJavelin Moth
- Cisseps fulvicollisYellow-Collared Scape Moth
- Coleophora cratipennellaStreaked Coleophora
- Globia subflavaYellow Sedge Borer, Yellowish Nonagria, Subflava Sedge Borer
- Xylena nuperaRed Swordgrass Moth, American Swordgrass Moth, False Armyworm
- Coleophora fagicorticella
2BeesSoutheastern regional records
Southeastern regional records · Juncus
Individual names are not available yet.
Noori, Seltmann & Orr 2026, A curated and integrated dataset for exploring global bee-plant interactions (GloBI), Zenodo, CC BY 4.0
0Specialist beesPollen specialists
5BirdsRecorded genus food-resource interactions; not a state feeding claim
Recorded genus food-resource interactions; not a state feeding claim · Juncus
- Alectoris chukarChukar
- Anas acutaNorthern Pintail
- Coturnicops noveboracensisYellow Rail
- Lagopus leucuraWhite-tailed Ptarmigan
- Plectrophenax nivalisSnow Bunting
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
Plant details
- Family
- Juncaceae
- Flower color
- Brown
- Growth rate
- Moderate
- Growth habit
- Spreads by rhizomes
- Foliage color
- Green
- Fruit begins
- Summer
- Fruit ends
- Summer
Safety has not been reviewed for this plant; check toxicity and thorns before planting.
Growing sources and scope
- Bloom · “June to September” · FloraQuest: Carolinas, Georgia (Southeastern Flora Team), phone app (app page) (ranked first; USDA PLANTS differs) · Carolinas and Georgia
- Flower color · “Brown” · USDA PLANTS · Nationwide species characteristics; local growing conditions may vary
- Foliage color · “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 · “Summer” · USDA PLANTS · Nationwide species characteristics; local growing conditions may vary
- Growth habit · “Spreads by rhizomes” · 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 2 feet” · USDA PLANTS · Nationwide species characteristics; local growing conditions may vary
- Light · “Partial shade; Full sun (documented habitat)” · FloraQuest: Carolinas, Georgia (Southeastern Flora Team), phone app (app page) · Carolinas and Georgia
- Soil · “Moist; Wet (documented habitat)” · FloraQuest: Carolinas, Georgia (Southeastern Flora Team), phone app (app page) · Carolinas and Georgia
Also known as
Grass Leaf Rush
Conservation status
| Virginia rank | S5? |
|---|---|
| Global rank | G5 |
| VA status | Not verified |
| Federal status | Not verified |
Will it fit your yard?
Check this plant against your county, sun and soil moisture. Conditions are checked in your browser.
Growing cautions
- Spreads by rhizomes. USDA PLANTS lists its growth form as rhizomatous. USDA PLANTS
For planning only; these do not change the score or Fit.
Sources
- Digital Atlas of the Virginia Flora
- USDA PLANTS
- Vascular Plants of North Carolina (NC Natural Heritage Program)
- NatureServe Explorer
- Shropshire & Tallamy 2025, Lepidoptera of North America north of Mexico, ZooKeys 1261 (ODbL)
- Noori, Seltmann & Orr 2026, A curated and integrated dataset for exploring global bee-plant interactions (GloBI), Zenodo, CC BY 4.0
- Smith, Bachelder, Russell, Morales, Mosher & Seltmann 2024, Bee-Specialization-Modeling v0.6.1 (specialist host table compiled from J. Fowler's pollen specialist bee lists), Zenodo, CC BY 4.0
- Hurlbert, Olsen, Sawyer & Winner 2021, Avian Diet Database, Scientific Data 8: 260 (CC0)
- Narango, Tallamy & Shropshire 2020, Few keystone plant genera support the majority of Lepidoptera species, Nature Communications