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 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.
)
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
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
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
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.)
This plant is causing problems in natural areas outside its native range, according to authorities such as:
- NC Department of Transportation
- SC List of Regulated Pest Plant Species, 2017
- Tennessee Exotic Pest Plant Council, 2009
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!
- Invasive Plants, Guide to Identification, Impacts and Control (Kaufman & Kaufman, 2007) p414
- Invasive Exotic Plants of North Carolina (Smith, 2008) p057
- Wildflowers of the Carolina Lowcountry (Porcher, 1995) p101
- Wildflowers of the Eastern United States (Duncan & Duncan, 1999) p056?
- Field Guide to the Wildflowers of Georgia (Chafin, 2016) p265
- Wildflowers of Tennessee (Carman, 2005) p151?
- Wildflowers of Tennessee, the Ohio Valley, and the Southern Appalachians (Horn, Cathcart, Hemmerly, & Duhl, 2005) p187?
If a search such as "Carex leptalea var. leptalea" doesn't deliver the results you want, try "Carex leptalea".
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