Ludwigia peploides subsp. glabrescens (Floating Primrose Willow, Etc.)

Ludwigia peploides subsp. glabrescens (Floating Primrose Willow) on 9-18-19, #634-25.

Floating Primrose Willow, Clove-Strip, Creeping Water Primrose, Water Primrose

Ludwigia peploides

(Ludwigia peploides subsp. glabrescens)

lud-WIG-ee-uh  pep-LOY-deez  gla-BRES-senz

Synonyms of Ludwigia peploides (7) (Updated on 12-5-21 from Plants of the World Online: Isnardia repens DC., Jussiaea peploides Kunth, Jussiaea repens var. peploides (Kunth) Griseb., Jussiaea swartziana DC., Ludwigia adscendens var. peploides (Kunth) H.Hara, Ludwigia clavellina var. peploides (Kunth) M.Gómez, Ludwigia repens Sw.
Synonyms of Ludwigia peploides subsp. glabrescens (3): Jussiaea repens var. glabrescens Kuntze, Ludwigia adscendens var. glabrescens (Kuntze) H.Hara, Ludwigia peploides var. glabrescens (Kuntze) Shinners

Ludwigia peploides (Kunth) P.H.Raven is the accepted scientific name for this species. It was named and described as such by Peter Hamilton Raven in Reinwardtia in 1964. It was first named and described as Jussiaea peploides by Karl (Carl) Sigismund Kunth in Nova Genera et Species Plantarum in 1823.

Ludwigia peploides subsp. glabrescens (Kuntze) P.H.Raven is the scientific name plants in Missouri are assigned to. It was named and described as such by Peter Hamilton Raven in Reinwardtia in 1964. It was first named Jussiaea repens var. glabrescens by Carl Ernst Otto Kuntze in Revisio Generum Plantarum in 1891.

Accepted infraspecific names of Ludwigia peploides (3): Ludwigia peploides subsp. glabrescens (Kuntze) P.H.Raven, Ludwigia peploides subsp. montevidensis (Spreng.) P.H.Raven, *Ludwigia peploides subsp. peploides (autonym). When infraspecific taxon are named, an autonym (type-specimen) is automatically generated which is the closest to the original species. 

The genus, Ludwigia L., was named and described as such by Carl von Linnaeus in the first volume of the first edition of Species Plantarum in 1753. 

As of 12-4-21 when this page was last updated, Plants of the World Online lists 83 species in the Ludwigia genus. It is a member of the plant family Onagraceae with  21 genera. Those numbers could change periodically as updates are made on POWO.

Distribution map of Ludwigia peploides from Plants of the World Online. Facilitated by the Royal Botanic Gardens, Kew. Published on the Internet; Retrieved on December 5, 2021.

The distribution map for Ludwigia peploides is from Plants of the World Online. Areas in green are where the species is native and purple where it has been introduced. You can view their map for Ludwigia peploides subsp. glabrescens HERE. POWO gets their maps for North America from Flora of North America for plant families included on their site. They haven’t finished with the plant family Onagraceae yet, but when they do POWO will update their maps. The maps on the USDA Plants Database for the species, subspecies, and autonym are basically the same. Remember, the species (as a whole) includes all the subspecies.

The map on iNaturalist shows where members have made observations. The link shows the map for the species as a whole. They have separate maps for the subspecies as well but most members have just posted their observations for the species (unless they know the difference already). I screwed up my first observation because I didn’t know about the subspecies at first. Then it became Research Grade… Anyone can join and it is a great website to confirm and share your observations. The maps on iNaturalist are continually updated as members post new observations. 


Ludwigia peploides subsp. glabrescens (Floating Primrose Willow) on 9-18-19, #634-26.

For as long as I can remember, even as a kid when my grandparents lived here, Ludwigia peploides have grown on the main pond behind the barn and one of the ponds in the back pasture. For some reason, they haven’t grown in the pond in the front pasture or the second pond in the back pasture (which is next to the other one). I remember my grandpa dragging these plants out of the pond with a rake. I never heard him call them by name but I know he didn’t like them.

As I became more involved with identifying the wildflowers on my farm (and a few other areas), I decided I just as well find out what these water weeds were. They turned out to be the subspecies Ludwigia peploides subsp. glabrescens. The “official” common name is Floating Primrose Willow but it also goes by Clove-Strip, Creeping Water Primrose, Water Primrose, and likely others.

The Missouri Plants website says plants in Missouri are assigned to Ludwigia peploides subsp. glabrescens. It is found predominantly from Nebraska to New York, down to Texas on through Florida. It is also now found in Puerto Rico. The species as a whole has a much broader range… Of course, no map is perfect…

Ludwigia peploides subsp. glabrescens (Floating Primrose Willow) on 9-18-19, #634-27.

I apologize for not writing descriptions when I published this page. I am updating plant pages, writing new pages, and adding photos I took over the summer. This is a wintertime project but I do get behind. 🙂 Writing descriptions in my own words is a lengthy process but you can check out the links below. I will write descriptions as soon as I have time.

Ludwigia peploides subsp. glabrescens (Floating Primrose Willow) on 9-18-19, #634-28.


Ludwigia peploides subsp. glabrescens (Floating Primrose Willow) on 9-18-19, #634-29.


Ludwigia peploides subsp. glabrescens (Floating Primrose Willow) on the pond behind the barn on 7-11-21, #810-14.

The pond behind the barn doesn’t hold that much water anymore because of an issue with the bank on the south side. After years of the cows walking a certain path, it created a ditch that just kept getting bigger. The Floating Primrose Willow likes it…

Ludwigia peploides subsp. glabrescens (Floating Primrose Willow) on 7-11-21, #810-15.

I have enjoyed photographing and learning about the many wildflowers growing on the farm and other areas. I have grown over 500 different plants and most have pages listed on the right side of the blog. I am not an expert, botanist, or horticulturalist. I just like growing, photographing and writing about my experience. I rely on several websites for ID and a horticulturalist I contact if I cannot figure them out. Wildflowers can be somewhat variable from location to location, so sometimes it gets a bit confusing. If you see I have made an error, please let me know so I can correct what I have written.

I hope you found this page useful and be sure to check the links below for more information. They were written by experts and provide much more information. Some sites may not be up-to-date but they are always a work in progress. If you can, I would appreciate it if you would click on the “Like” below and leave a comment. It helps us bloggers stay motivated. You can also send an email to me at I would enjoy hearing from you especially if you notice something is a bit whacky.

NOTE: Plants of the World Online is the most up-to-date database. It is very hard for some to keep with name changes these days so you may find a few discrepancies between the websites. Just be patient. Hopefully, someday they will be in harmony. 🙂




NOTE: The data (figures, maps, accepted names, etc.) may not match on these websites. It depends on when and how they make updates and when their sources make updates. Some websites have hundreds and even many thousands of species to keep up with. Accepted scientific names change periodically and it can be hard to keep with as well. Some of the links may use a name that is a synonym on other sites. In my opinion, Plants of the World Online by Kew is the most reliable and up-to-date plant database and they make updates on a regular basis. I make updates “at least” once a year and when I write new pages or add new photos but I do get behind. We are all a work in progress. 🙂


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