Native & Naturalized Plants of the Carolinas & Georgia


1969

Emergent aquatic (rooted); Forb
Perennial

Non-native

Documented growing wild in GA NC SC

Uncommon in Coastal Plain, rare in Piedmont

Look for it in ponds, lakes, sluggish waters of ditches or streams, per Weakley's Flora

map
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INVASIVE

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

 

 

Aquatic

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!



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

WEAKLEY'S FLORA (2/8/20):
Ludwigia grandiflora   FAMILY Onagraceae

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

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

INCLUDED WITHIN Synthesis of the North American Flora (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 (1968) 137-01-004?:
Ludwigia uruguayensis   FAMILY Onagraceae

SYNONYMOUS WITH -
Ludwigia grandiflora var. grandiflora

 

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


Click or hover over the thumbnails to see larger pictures.

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.

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.

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

Primary leaves usually linear-lanceolate & widest below middle, per Weakley's Flora.


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