OF THE CAROLINAS & GEORGIA

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



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

SYNONYMOUS WITH Flora of North America north of Mexico, vol. 10 (2021)

Ludwigia grandiflora

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

Ludwigia grandiflora ssp. 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).

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

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).

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

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).

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

JK Marlow    jkm0506k_14

June    Union County    SC

Sumter National Forest: Tyger Ranger District


click here to see other plants that look similar to this 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 Flora of North America north of Mexico, vol. 10
Ludwigia grandiflora

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

 

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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.


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!



 


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