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Lythrum salicaria L.
PURPLE LOOSESTRIFE
Rainbow weed; Spiked loosestrife; Purple Loosetrife; Lythrum gracile Dc; Lythrum intermedium Ledeb ex Colla; Lythrum tomentosum Dc; Purple-loosestrife

Life   Plantae   Dicotyledoneae   Lythraceae   Lythrum

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Lythrum salicaria
© Copyright Bobby Hattaway 2011 · 5
Lythrum salicaria
Lythrum salicaria
© Copyright Bobby Hattaway 2011 · 5
Lythrum salicaria

Lythrum salicaria
© Copyright Bobby Hattaway 2011 · 5
Lythrum salicaria
Lythrum salicaria, inflorescence - whole - unspecified
© Copyright Steve Baskauf, 2002-2011 · 4
Lythrum salicaria, inflorescence - whole - unspecified

Lythrum salicaria, leaf - basal or on lower stem
© Copyright Steve Baskauf, 2002-2011 · 4
Lythrum salicaria, leaf - basal or on lower stem
Lythrum salicaria, whole plant - in flower - general view
© Copyright Steve Baskauf, 2002-2011 · 4
Lythrum salicaria, whole plant - in flower - general view

Lythrum salicaria, inflorescence - frontal view of flower
© Copyright Steve Baskauf, 2002-2011 · 4
Lythrum salicaria, inflorescence - frontal view of flower
Lythrum salicaria, stem - showing leaf bases
© Copyright Steve Baskauf, 2002-2011 · 4
Lythrum salicaria, stem - showing leaf bases

Lythrum salicaria, leaf - margin of upper + lower surface
© Copyright Steve Baskauf, 2002-2011 · 4
Lythrum salicaria, leaf - margin of upper + lower surface
Lythrum salicaria
© Copyright Malcolm Storey 2011-2117 · 3
Lythrum salicaria

Lythrum salicaria
© Copyright Malcolm Storey 2011-2117 · 3
Lythrum salicaria
Lythrum salicaria
© Copyright Malcolm Storey 2011-2117 · 3
Lythrum salicaria

Lythrum salicaria
© Copyright Malcolm Storey 2011-2117 · 3
Lythrum salicaria
Lythrum salicaria
© Copyright Malcolm Storey 2011-2117 · 3
Lythrum salicaria

Lythrum salicaria, _flower_close_up.JP80279_21.320.jpg
© Photographer/source
Lythrum salicaria, flower close up
JP80279_21
Lythrum salicaria, _leaves.JP80279_23.320.jpg
© Photographer/source
Lythrum salicaria, leaves
JP80279_23

Associates · map
FamilyScientific name @ source (records)
Agaricaceae  Phoma lirellata @ BPI (1)
Andrenidae  Andrena wilkella @ CUIC_ENT (1)
Aphididae  Aphis ( @ AMNH_PBI (2)

Mordwilkoja vagabunda @ NCSU (2)

Myzus ( @ NCSU (10); AMNH_PBI (1)
Apidae  Bombus terricola @ VTST_ENT (1)

Melissodes apicata @ CUIC_ENT (1)

Xylocopa virginica @ CUIC_ENT (3)
Coccinellidae  Harmonia axyridis @ I_LB (1)
Dacrymycetaceae  Dacrymyces lythri @ BPI (1)
Dermateaceae  Discohainesia oenotherae @ BPI (1); 656174A (1); 656174B (1); 656174C (1)

Naeviopsis simulans @ BPI (1)

Pyrenopeziza lycopsidis @ BPI (1)
Erysiphaceae  Erysiphe communis @ BPI (1)

Erysiphe lythri @ BPI (2)

Erysiphe polygoni @ BPI (2)
Halictidae  Agapostemon sericeus @ UCMS_ENT (4)

Agapostemon splendens @ UCMS_ENT (1)

Agapostemon virescens @ UCMS_ENT (1)

Augochlora pura @ CUIC_ENT (1)

Augochlorella aurata @ CUIC_ENT (1)

Dufourea novaeangliae @ BBSL (11)
Hyaloscyphaceae  Dasyscyphus salicariae @ BPI (1)

Lachnum salicariae @ BPI (1)
Megachilidae  Anthidium manicatum @ UCMS_ENT (1); CUIC_ENT (3)

Megachile centuncularis @ UCMS_ENT (1)

Megachile gemula @ CUIC_ENT (1)

Megachile inimica @ AMNH_BEE (1)

Megachile sculpturalis @ UCMS_ENT (10); CUIC_ENT (1); AMNH_BEE (1)
Melanconidaceae  Harknessia lythri @ BPI (1)
Melittidae  Melitta nigricans @ AMNH_BEE (5)
Mycosphaerellaceae  Cercospora lythri @ BPI (6)

Cercospora sanguinea @ BPI (1)

Septoria brissaceana @ BPI (10)

Septoria lythrina @ BPI (3)
Phaeosphaeriaceae  Leptosphaeria salicaria @ BPI (1)
Schizoparmaceae  Coniella fragariae @ BPI (1)
_  Coremiella cystopoides @ BPI (1)

Depazea lythri @ BPI (1)

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Following modified from PCA Alien Plant Working Group
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Following modified from Global Invasive Species Team, The Nature Conservancy
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&pull 20q v4.662 20091102: Error 403 Forbidden http://wiki.bugwood.org/Lythrum_salicaria/

Following modified from Delaware Wildflowers
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Delaware Wildflowers  •  Scientific names

Lythrum salicaria L. Purple Loosestrife
Lythraceae — Loosestrife family
Invasive non-native
Lythrum salicaria
Brandywine Creek State Park
July 2001

More information on this plant, from other sources.


Copyright David G. Smith

Delaware Wildflowers main page

Following modified from MissouriPlants.com
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Lythrum salicaria L. - Swamp Loosestrife

Lythrum salicaria plant

Family - Lythraceae

Stems - Multiple from base, becoming woody at the base, herbaceous above, to 2m tall, 4-angled, scabrous, pubescent to hispidulous, erect.

Lythrum salicaria stem

Leaves - Opposite to subopposite in inflorescence, linear-lanceolate to oblong-linear, sessile, somewhat clasping or not, entire, scabrous, +/-10cm long, +/-2cm broad, acute, reduced upward, greatly reduced in inflorescence to foliaceous bracts.

Lythrum salicaria leaves

Inflorescence - Dense terminal spikes with clusters of 3-9 flowers per node. Flowers subtended by reduced leaf(foliaceous bract). Bracts dense pubescent. Axis of inflorescence dense pubescent to tomentose.

Flowers - Petals 5, borne at apex of floral tube, to 7mm long, 3.5mm broad, glabrous, subequal, oblong-obovate, pinkish-rose. Stamens 10-12, in two sets of five or six each. Longer set of stamens well exserted. Filaments to 1.3cm long, adnate at base of floral tube. Anthers purple. Shorter set of stamens included to slightly exserted. Filaments white and fading to pinkish-purple at apex. Anthers yellow. Ovary cylindrical-conic, 2.5mm long, 1mm in diameter, glabrous. Style 1mm long, curved. Stigma glandular, capitate, green. Floral tube to 7mm long, 3mm in diameter, cylindric, 12-nerved, dense pubescent, with 6 appendages. Appendages linear-attenuate, 2-3mm long, greenish, alternating with calyx lobes. Calyx lobes pink, to 1mm long, shorter than appendages, acute.

Lythrum salicaria flowers Flower close-up.

Lythrum salicaria calyx Calyx.

Flowering - June - September.

Habitat - Moist to wet ground along ditches, streambanks, meadows, waste ground, prairies, roadsides, railroads. Also cultivated.

Origin - Native to Europe.

Other info. - Efforts to keep this plant under control in Missouri so far have met with moderate success. The plant is rare in the wild and typically gets destroyed upon its discovery. You can help too. If you find the plant in the wild, report its location to Missouri Department of Conservation. This is no laughing matter as anyone who has been to New England or the Northeast can attest. The plant is highly invasive and can quickly spread through an area and out-compete all native flora. It creates a sea of pink which may be pretty to look at but is an environmental disaster. Don't be tempted to grow it at home, find something else.

Photographs taken off Hwy 64, somewhere in the U.P. of Michigan, 9-7-03.


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Following modified from Plants Database, United States Department of Agriculture
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http://plants.usda.gov/java/profile?symbol=LYSA2 ---> https://plants.usda.gov/java/profile?symbol=LYSA2
&pull 20q v4.662 20091102: Error 501 Protocol scheme 'https' is not supported (LWP::Protocol::https not installed) https://plants.usda.gov/java/profile?symbol=LYSA2

Following modified from CalPhotos
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http://calphotos.berkeley.edu/cgi/img_query?query_src=dl&where-taxon=Lythrum+salicaria&where-lifeform=specimen_tag&rel-lifeform=ne&rel-taxon=begins+with&where-lifeform=Plant ---> https://calphotos.berkeley.edu/cgi/img_query?query_src=dl&where-taxon=Lythrum+salicaria&where-lifeform=specimen_tag&rel-lifeform=ne&rel-taxon=begins+with&where-lifeform=Plant
&pull 20q v4.662 20091102: Error 501 Protocol scheme 'https' is not supported (LWP::Protocol::https not installed) https://calphotos.berkeley.edu/cgi/img_query?query_src=dl&where-taxon=Lythrum+salicaria&where-lifeform=specimen_tag&rel-lifeform=ne&rel-taxon=begins+with&where-lifeform=Plant

Updated: 2017-12-17 05:25:10 gmt
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