Seedbox, Smooth Seedbox, Bushy Seedbox, Rattle-box, Square-pod Water-primrose - Ludwigia alternifolia
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Ludwigia alternifolia - Seedbox, Smooth Seedbox, Bushy Seedbox, Rattle-box, Square-pod Water-primrose. Ludwidigia alternifolia is a plant found in swamps and other moist areas throughout much of the eastern United States and on west into Colorado. It grows to three or four feet tall, although it may have a tendency to recline on other plants, blooming from mid- to late summer.
Thanks to Twitter friend @PineLilyFNPS for the tip that Ludwigia species are larval hosts for the Banded Sphinx Moth - Eumorpha fasciatus
Found in:
AL, AR, CO, CT, DC, DE, FL, GA, IA, IL, IN, KS, KY, LA, MA, MD, MI, MO, MS, NC, NE, NJ, NY, OH, OK, PA, RI, SC, TN, TX, VA, VT, WI, WV
Leave comments on Ludwigia alternifolia at this link. | 
Distribution of Ludwigia alternifolia in the United States and Canada:
Map courtesy of The Biota of North America Program.
Map color key
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| | Site: Walker County, GA Date: 2011-July-22 | Photographer: Gerald C. Williamson
Nikon D7000
Tamron SP 90MM f/2.8 AF Macro | | The four yellow petals of the 1/2" to 3/4" blossom are easily knocked off. When I first spotted this plant on my property, I made a note to go back and photograph it later. When I did, much to my chagrin, the petals were all laying on the ground. Fortunately it continued producing flowers for several weeks. | | 
| | Site: Walker County, GA Date: 2011-July-22 | Photographer: Gerald C Williamson
Nikon D7000 | | The lanceolate leaves grow alternately on the frequently reddish stem. The leaves are entire (without teeth or lobes). The leaves and stem may be sparsely hairy, or may be glabrous (without hair.) | | Click on the photo for a larger image
| | Site: Walker County, GA Date: 2011-July-30 | Photographer: Gerald C Williamson
Nikon D7000
Tamron SP 90MM f/2.8 AF Macro | | The four-sided seed capsule gives Ludwigia alternifolia its most-used common name, "Seedbox." The seedbox will be brown later in the season. | | Click on the photo for a larger image
| | Site: Walker County, GA Date: 2011-September-08 | Photographer: Gerald C Williamson
Nikon D7000
Tamron SP 90MM f/2.8 AF Macro | | Ludwigia alternifolia's namesake seedbox. | | Click on the photo for a larger image
| | Site: Walker County, GA Date: 2011-September-08 | Photographer: Gerald C Williamson | | Ludwigia alternifolia's namesake seedbox. | | Click on the photo for a larger image
| | Site: Walker County, GA Date: 2011-September-08 | Photographer: Gerald C Williamson
Nikon D7000 | | Ludwigia alternifolia's namesake seedbox. | | Click on the photo for a larger image
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References used for identification and information:
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