NameThatPlant.net: Ludwigia grandiflora

Spermatophytes (seed plants): Angiosperms (flowering plants): Eudicots: Core Eudicots: Rosids: Malvids: Myrtales

WEAKLEY'S FLORA OF THE SOUTHEASTERN US (4/24/22):
Ludwigia grandiflora FAMILY Onagraceae Go to FSUS key

Dig deeper at SERNEC, a consortium of southeastern herbaria.

Check out EDDMapS.org to see where this has been reported.

Read more about Showy Water-primrose at Vascular Plants of North Carolina.

SYNONYMOUS WITH PLANTS NATIONAL DATABASE:
Ludwigia grandiflora ssp. grandiflora FAMILY Onagraceae

SYNONYMOUS WITH Floristic Synthesis of North America. BONAP (Kartesz, 2021)

Ludwigia grandiflora ssp. grandiflora

SYNONYMOUS WITH Flora of North America

Ludwigia grandiflora

SYNONYMOUS WITH New combinations in the Florida flora III (Ward, 2012)

Ludwigia grandiflora var. grandiflora

INCLUDED WITHIN Guide to the Vascular Plants of Florida (Wunderlin & Hansen, 2011)

Ludwigia grandiflora

INCLUDED WITHIN Floristic Synthesis of North America (Kartesz, 1999)

Ludwigia uruguayensis

SYNONYMOUS WITH Separation of 2 species within Ludwigia uruguayensis (Zardini, Gu, Raven, 1991)

Ludwigia grandiflora

INCLUDED WITHIN VASCULAR FLORA OF THE CAROLINAS (Radford, Ahles, & Bell, 1968) 137-01-004?:

Ludwigia uruguayensis FAMILY Onagraceae

SYNONYMOUS WITH Gray's Manual of Botany (Fernald, 1950)

Jussiaea michauxiana

COMMON NAME:
Showy Water-primrose, Large-flower Water-primrose

To see larger pictures, click or hover over the thumbnails.

image of Ludwigia grandiflora, Showy Water-primrose, Large-flower Water-primrose

Dan Whitten sdw_lgrandiflora

May Georgetown County SC

Emergent leaves 5-8.5cm long, 7-11mm wide, mostly linear-lanceolate, usually widest below middle, per Weakley's Flora (2022).

JK Marlow jkm0506k_07

June Union County SC

Sumter National Forest: Tyger Ranger District

Stems grow into open water, intertwine, and form floating mats, per Wildflowers of the Carolina Lowcountry (Porcher, 1995).

JK Marlow jkm0506k_11

June Union County SC

Sumter National Forest: Tyger Ranger District

In summer, on erect flowering stems, the leaves elongate, per Wildflowers of the Carolina Lowcountry (Porcher, 1995).

JK Marlow jkm0506k_14

June Union County SC

Sumter National Forest: Tyger Ranger District

COMPARE aquatic plants

WEAKLEY'S FLORA OF THE SOUTHEASTERN US (4/24/22):
Ludwigia grandiflora FAMILY Onagraceae

SYNONYMOUS WITH PLANTS NATIONAL DATABASE:
Ludwigia grandiflora ssp. grandiflora FAMILY Onagraceae

SYNONYMOUS WITH Floristic Synthesis of North America. BONAP (Kartesz, 2021)
Ludwigia grandiflora ssp. grandiflora

SYNONYMOUS WITH Flora of North America
Ludwigia grandiflora

SYNONYMOUS WITH New combinations in the Florida flora III (Ward, 2012)
Ludwigia grandiflora var. grandiflora

INCLUDED WITHIN Guide to the Vascular Plants of Florida (Wunderlin & Hansen, 2011)
Ludwigia grandiflora

INCLUDED WITHIN Floristic Synthesis of North America (Kartesz, 1999)
Ludwigia uruguayensis

SYNONYMOUS WITH Separation of 2 species within Ludwigia uruguayensis (Zardini, Gu, Raven, 1991)
Ludwigia grandiflora

INCLUDED WITHIN VASCULAR FLORA OF THE CAROLINAS (Radford, Ahles, & Bell, 1968) 137-01-004?:
Ludwigia uruguayensis FAMILY Onagraceae

SYNONYMOUS WITH Gray's Manual of Botany (Fernald, 1950)
Jussiaea michauxiana

1969

Emergent aquatic (rooted); Forb
Perennial

Habitat: Ponds, lakes, sluggish waters of ditches or streams, per Weakley's Flora

Non-native

Uncommon in Coastal Plain, rare in Piedmont

map
Click here to see a map, notes, and images from Weakley's Flora of the Southeastern US.

Click here to see a map showing all occurrences known to SERNEC, a consortium of southeastern herbaria. (Zoom in to see more detail.)

INVASIVE

This plant is causing problems in natural areas outside its native range, according to authorities such as:

LEAVES:
Simple
Alternate

FLOWER:
Spring/Summer/Fall
Yellow
5-6 sepals
5-6 petals
Inferior ovary

FRUIT:
Spring/Summer/Fall
Capsule

TO LEARN MORE about this plant, look it up in a good book!