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 Add this item to the list   Ludwigia peploides


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 Author(s):(Kunth) P.H. Raven 
 Subspecies:Ludwigia peploides (Kunth) P.H. Raven subsp. glabrescens (O. Kunth) P.H. RavenLudwigia peploides (Kunth) P.H. Raven subsp. montevidensis (Spreng.) P.H. RavenLudwigia peploides (Kunth) P.H. Raven subsp. peploidesLudwigia peploides (Kunth) P.H. Raven subsp. stipulacea (Ohwi) P.H. Raven 
 Vernacular names:water primrose; creeping primrose, floating primrose-willow (UK), kleine waterteunisbloem (NL) 
 Synonyms:Jussiaea californica (S. Wats.) Jeps.; Jussiaea diffusa var. californica (S. Wats.) Greene ex Jeps.; Jussiaea diffusa sensu auct.; Jussiaea fluitans G. Don; Jussiaea gomezii Goyena; Jussiaea glandulosa Larrañaga; Jussiaea montevidensis Spreng.; Jussiaea patibicensis Kunth; Jussiaea peploides Kunth; Jussiaea polygonoides Kunth; Jussiaea ramulosa DC.; Jussiaea ramulosa (DC.) Gómez; Jussiaea repens L. var peploides (Kunth) Griseb.; Jussiaea repens var. glabrescens O. Kuntze; Jussiaea repens subsp. hirsuta var. ramulosa (DC.) Hassler; Jussiaea repens subsp. hirsuta var typica Hassler; Jussiaea repens var. californica S. Watz.; Jussiaea repens var. clarenciana H. Lév.; Jussiaea repens var minor Mich.; Jussiaea repens L. var. montevidensis (Spreng.) Munz.; Jussiaea repens var. ramulosa (DC.) Gris.; Jussiaea repens sensu Benth.; Jussiaea repens sensu Forbes & Hemsley non L.; Jussiaea stipulacea Ohwi; Jussiaea swartziana DC.; Ludwigia adscendens var. montevidensis (Spreng.) H. Hara; Ludwigia adscendens (L.) H. Hara var. stipulacea (Ohwi) H. Hara; Ludwigia diffusa var. californica (S. Wats.) Greene; Ludwigia repens auct. non L.; Ludwigia stipulacaea (Ohwi) Ohwi 
 EPPO code:"IUSRG Ludwigia peploides Raven subsp. glabrescens (Kuntze) P.H. Raven; LUDPE Ludwigia peploides P.H. Raven; LUDPM Ludwigia peploides P.H. Raven subsp. montevidensis (Kunth) P.H. Raven; LUDPS Ludwigia peploides P.H. Raven subsp.stipulacea (Ohwi) P.H. Raven" 
 Plant code - standard list:FB5499 
 Botanical thesaurus:
 Factsheet link (English):
 Factsheet link (French):
 Factsheet link (Dutch):


Roots and stem
 Description of subterranean parts:2 types of roots are observed: roots which absorb nutrients and attach the plant to the soil, and adventitious roots located along the stems which ensure oxygen uptake and favour rooting of plant fragments (cuttings). 
 Description of stem:Purple, floating and subglabrous in vegetative state, erect and finely hairy in flowering state; stem branched, ascending. Up to 3 m long in deep water, and up to 80 cm above water level. 
Fruit and seeds
 Description of seed:baculiform, rectangular, wrinkled, dull brown. 
 Description of fruit:Fruiting pedicel (1) 2-4 (6.5) cm, capsule finely hairy to subglabrous, light brown; seeds firmly embedded in woody coherent endocarp, pendulous, appearing as bumps in capsule wall ca 1.5 mm apart, uniserate. Bracteoles present near base or middle of capsule, deltoid, ca 1 mm long, sometimes absent 
 Length of seed (mm) :1.84 
 Description of propagule:Fragmentation of stems; seeds (in Europe) viable? 
 Description of leaf:very polymorphic, dark green, shiny, net-veined (lateral veins 7-11 per side); stipulae swollen. Base narrowly cuneate, apex acute to acuminate or obtuse. Early growth consists of rosette-like clusters of rounded leaves on the water surface; at flowering leaves lengthen to a lanceolate or elliptic shape. 
 Length of petiole (cm):0.2 - 3.5 
alternate yes
opposite no
decussate no
whorled no
 Description of inflorescence:flowers solitary, axillary. 
 Description of flower:Actinomorphic; sepals 5, hairy (1-2 mm); petals 5, caducous; stamens in 2 whorls; disc slightly elevated, with depressed white-hairy nectary surrounding the base of each epitalous stamen; style yellow, densely long-hairy in lower half or higher; stigma lemon yellow1.2-2 mm across, about 1 mm deep. 
Colour of flower:
white no
yellow yes
orange no
pink no
brown no
red no
purple no
blue no
green no
 Description of stamens:The epipetalous ones slightly shorter; filaments 2-4 (5) mm, bright yellow; anthers (1) 1.3 (1.8) mm, pale yellow. 
 Description of ovary:Ovary inferior, with 5 loculi and numerous seeds in 1 row per locule. 
 Length of styles (mm):2.5 - 5 
 Description of stigmas:Depressed-globose, deeply 5-lobed. 

Additional information

 Similar species:Ludwigia grandiflora and Ludwigia peploides are morphological very similar and are difficult to differentiate in absence of flowers. In flower the species can be separated by the length of the anthers and the form and consistency of the stipulae. Ludwigia grandiflora: anthers 2-3 mm long and stipulae oblong, triangular and flat. Ludwigia peploides: anthers 1.3 mm long and stipulae almost round, strongly swollen in fresh state. 
 Look-alike link:

Distribution information

 Original distribution:South America: Brazil, Argentina, Chile, Uruguay and Paraguay. 
 Current distribution:Data on their geographical distribution is lacking and complicated by the fact that the genus Ludwigia is Under revision. As a consequence, the following distribution is only preliminary. Asia: China, Japan, Taiwan. Europe: Belgium, France, Greece, Italy, Netherlands, Spain and Switzerland and regulated in Portugal. North America: USA, Mexico. Central America: Costa Rica, Cuba, Dominican Republic, El Salvador, Guatemala, Haiti, Honduras, Jamaica, Nicaragua, Panama, Puerto Rico. South America: Argentina, Bolivia, Brazil, Chile, Colombia, Equator, Paraguay, Peru, Uruguay. Oceania: Australia, New Zealand. 
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Biochemistry and molecular data

 Ploidy:2n = 16 
 Biochemical information:The species has a high content of saponins and calcium oxalate. 


Life cycle:
annual no
perennial yes
monocarp no
biennial no
 Competitiveness:it forms very dense (almost impenetrable) mats. 
Flowering time in Europe:
January no
February no
March no
April no
May no
June yes
July yes
August yes
September yes
October no
November no
December no
 Hardiness:the plant have shown a rather good resistance to frost in Europe. 
 Habitat requirements:Slow-flowing waterways. Lakes, ponds, ditches. The species is also able to colonize river banks and humid pastures. 
 Ecological amplitude:The plant has a preference for growing in full sun. 
 Habitat in the Netherlands:Eutrophic ditches and canals, sand- and claypits. 
 Palatability:The species is poorly consumed by herbivorous animals. 

Invasiveness, risk and control

Dispersal mechanism:
wind ?
water yes
others yes
endozoochorous ?
ectozoochorous ?
 Host, diseases and pest information:in Argentina Lysathia flavipes (Coleoptera) attacks Ludwigia. 
 Invasive behavior information:The rapid and extensive development of a plant population can block waterways (and thus disturb many human activities), reduce biodiversity and degrade water quality. In France biomass can double in 15 to 20 days in slow-flowing waters, and in 70 days in rivers. 
 Control:Control is very difficult (mechanical control is possible but care should be taken not to produce more fragments which may disseminate the plant further, herbicides are available but their use in the natural environment is difficult). 
 Pathway of introduction:Plants for planting of L. peploides (soil/water containing viable plant fragments or seeds?) 

Link to other websites / databases

 Link to other websites_Url:


 Pest Risk Analysis: