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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

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Not native

Not native to Florida. How scores work Is it native here?

Profile 76%

Height
Up to about 6 feet
Light
Partial shade, Full shade, Full sun
Soil moisture
Moist to standing water

At a glance

Life cycle
Perennial
Bloom
May to June

Not yet recorded · Spread · Leaves

Recorded in 1 Florida county.

Natural habitats

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

1 of 2

Ponds, lakes and their shores

Georgia pond and emergent wetland
Regional / representative. Shown: Chattahoochee River National Recreation Area, Georgia; representative pond ecosystem, a neighboring state.Georgia pond and emergent wetland, Robert 'Bob' Hynes, 1997. Public domain. Source record.

Floodplain and bottomland forests

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

All habitats

Also found with this plant

Wildlife whose habitat models include habitats this plant grows in, in Florida. Shared habitat, not food. 93 animals.

All wildlife of Florida

Ecological relationships

Who uses this plant?

What these records mean

5CaterpillarsGenus host records with ranges including FL

Genus host records with ranges including FL · Glyceria

  • Apamea dubitansDoubtful Agroperina
  • 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)
—BeesSoutheastern regional records
—Specialist 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

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

Growing sources and scope
Also known as

Floating Manna Grass; Northern Manna Grass

Conservation status

Florida rankNot available
Global rankG5
FL statusNot verified
Federal statusNot verified

Conservation source Global and federal source

Native alternatives

Find natives for your garden

Sources