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Floating Mannagrass

Glyceria septentrionalis

In the Carolinas and Georgia, found in shallow water, wet mucky soils, floodplain sloughs, cypress ponds. Weakley, Flora of the Southeastern United States (2025), Carolinas & Georgia edition What its natural habitat tells you

28
Good

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

Profile 94%

Height
Up to about 6 feet
Light
Partial shade, Full shade, Full sun
Soil moisture
Moist to standing water
Will it fit your yard?

Rare or protected plant. Specialist conservation planting; excluded from routine garden suggestions. Plant caution source

Hidden from default planting suggestions. Wildlife value and native status remain unchanged.

At a glance

Life cycle
Perennial
Bloom
May to June

Not yet recorded · Spread · Leaves

Recorded in 4 Louisiana parishes.

Natural habitats

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

1 of 2

Floodplain and bottomland forests

Forests on low ground beside rivers and streams that flood from time to time.

Ponds, lakes and their shores

Still water and its edges: ponds, lakes, millponds and reservoirs.

All habitats

Ecological relationships

Who uses this plant?

What these records mean

4CaterpillarsGenus host records with ranges including LA

Genus host records with ranges including LA · Glyceria

  • Leucania commoidesDusky Wainscot, Comma Wainscot
  • Limochores origenesCrossline Skipper
  • Mythimna unipunctaArmyworm Moth, White Speck
  • Polites themistoclesTawny-Edged Skipper
Shropshire & Tallamy 2025, Lepidoptera of North America north of Mexico, ZooKeys 1261 (ODbL)
0BeesSoutheastern regional records
0Specialist beesPollen specialists
2BirdsRecorded genus food-resource interactions; not a state feeding claim

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

  • Aythya americanaRedhead
  • Meleagris gallopavoWild Turkey
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
White or green
Growing sources and scope
Also known as

Floating Manna Grass; Northern Manna Grass

Conservation status

Louisiana rankS1
Global rankG5
LA statusNot verified
Federal statusNot verified

Conservation source Global and federal source

In your garden

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Sources