Widgeon-grass
Ruppia maritima
Found in brackish estuaries, rivers, marsh pools. 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 2.4 inches
- Light
- Full sun
- Soil moisture
- Standing water
No photograph yet. Looking for an old drawing…
At a glance
- Bloom
- July to October
- Fruiting season
- Spring to summer
Not yet recorded · Spread · Life cycle · Leaves
Recorded in 16 Virginia counties.
Natural habitats
Places it grows wild. Not a planting requirement. Each habitat page lists the plants and wildlife also found there.
Streams, rivers and their banks

Salt and brackish open water of sounds, bays and estuaries, with the mud and sand flats and seagrass beds that tides cover and uncover; the vegetated marsh is salt and brackish marshes.
Open, herb-covered wetlands with fresh, non-tidal water.
Also found with this plant
Wildlife whose habitat models include habitats this plant grows in, in Virginia. Shared habitat, not food. 106 animals.
- American AvocetRecurvirostra americana
- American BitternBotaurus lentiginosus
- American Black DuckAnas rubripes
- American CrowCorvus brachyrhynchos
- American OystercatcherHaematopus palliatus
- American PipitAnthus rubescens
- American WigeonAnas americana
- Bald EagleHaliaeetus leucocephalus
- Bank SwallowRiparia riparia
- Barn SwallowHirundo rustica
- Belted KingfisherMegaceryle alcyon
- Black RailLaterallus jamaicensis
- Black SkimmerRynchops niger
- Black-crowned Night-heronNycticorax nycticorax
- Black-necked StiltHimantopus mexicanus
- Blue-winged TealAnas discors
- Boat-tailed GrackleQuiscalus major
- Bonaparte's GullChroicocephalus philadelphia
- BrantBranta bernicla
- Brown PelicanPelecanus occidentalis
- Canada GooseBranta canadensis
- CanvasbackAythya valisineria
- Caspian TernHydroprogne caspia
- Chimney SwiftChaetura pelagica
Who uses this plant?
11BirdsRecorded genus food-resource interactions; not a state feeding claim
Recorded genus food-resource interactions; not a state feeding claim · Ruppia
- Aythya americanaRedhead
- Aythya collarisRing-necked Duck
- Aythya marilaGreater Scaup
- Aythya valisineriaCanvasback
- Cygnus columbianusTundra Swan
- Cygnus olorMute Swan
- Fulica americanaAmerican Coot
- Mareca americanaAmerican Wigeon
- Mareca penelopeEurasian Wigeon
- Mareca streperaGadwall
Show all 11
- Spatula clypeataNorthern Shoveler
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
- Cymodoceaceae
- Flower color
- Green
- Growth rate
- Rapid
- Growth habit
- Spreads by rhizomes
- Foliage color
- Green
- Fruit begins
- Spring
- Fruit ends
- Summer
Safety has not been reviewed for this plant; check toxicity and thorns before planting.
Growing sources and scope
- Bloom · “July to October” · FloraQuest: Carolinas, Georgia (Southeastern Flora Team), phone app (app page) (ranked first; USDA PLANTS differs) · Carolinas and Georgia
- Flower color · “Green” · 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 · “Spring” · 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 · “Rapid” · USDA PLANTS · Nationwide species characteristics; local growing conditions may vary
- Height · “About 2.4 inches” · USDA PLANTS · Nationwide species characteristics; local growing conditions may vary
- Light · “Full sun (documented habitat)” · FloraQuest: Carolinas, Georgia (Southeastern Flora Team), phone app (app page) · Carolinas and Georgia
- primary_flower_color · “green” · USDA PLANTS
- Soil · “Water (documented habitat)” · FloraQuest: Carolinas, Georgia (Southeastern Flora Team), phone app (app page) · Carolinas and Georgia
Also known as
Widgeon grass
Conservation status
| Virginia rank | Not available |
|---|---|
| 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)
- 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

























