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is characterized by its distinctive square-shaped stem, with leaves evenly spaced in a tetragonal arrangement around the stem, giving the plant a square-like appearance. The leaves are hairless and solid green and have a unique shimmer in direct sunlight.
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The erect perennial herb typically grows to a height of 0.1 to 1.3 metres (0.3 to 4.3 ft) and can have several stems. It blooms between
January and November and produces pink-purple flowers.
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Diagram illustrating tetragonal / square arrangement of leaves
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229:The species has become naturalised in the
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753:. You can help Knowledge (XXG) by
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671:urn:lsid:ipni.org:names:612378-1
305:. Western Australian Government
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237:regions of Western Australia.
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815:Taxa named by Carl Linnaeus
810:Rosids of Western Australia
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213:square stalked willow herb
16:Species of flowering plant
219:in the willowherb family
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60:Scientific classification
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805:Plants described in 1753
211:, commonly known as the
254:Overhead view of small
297:"Epilobium tetragonum"
524:Epilobium tetragonum
386:Epilobium tetragonum
356:Epilobium tetragonum
276:Epilobium tetragonum
208:Epilobium tetragonum
191:Epilobium tetragonum
25:Epilobium tetragonum
215:, is a species of
173:E. tetragonum
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630:Open Tree of Life
348:Taxon identifiers
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217:flowering plant
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321:"WIllow herb"
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256:E. tetragonum
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182:Binomial name
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658:kew-2791119
555:iNaturalist
380:Wikispecies
241:Description
103:Angiosperms
794:Categories
653:Plant List
283:References
221:Onagraceae
149:Onagraceae
800:Epilobium
511:240010121
493:FloraBase
302:FloraBase
167:Species:
160:Epilobium
73:Kingdom:
747:Myrtales
691:VASCAN:
684:23200163
679:Tropicos
573:612378-1
417:BioLib:
365:Wikidata
330:16 April
145:Family:
139:Myrtales
116:Eudicots
547:7322563
459:2903015
371:Q159604
155:Genus:
135:Order:
77:Plantae
40:Flower
635:980118
606:NZOR:
599:644183
534:EPITET
531:FoIO:
485:176469
433:288761
410:106446
397:149287
394:APDB:
129:Rosids
54:Habit
745:This
701:WoI:
694:29046
642:PFI:
617:NZPCN
560:56622
519:FoAO2
480:EUNIS
472:EPIAD
446:6G4MQ
420:40173
258:plant
231:Perth
123:Clade
110:Clade
97:Clade
84:Clade
751:stub
704:1281
666:POWO
645:3381
622:3878
594:NCBI
568:IPNI
542:GBIF
498:6134
467:EPPO
428:BOLD
405:APNI
332:2023
235:Peel
233:and
712:WFO
581:NBN
506:FNA
454:EoL
441:CoL
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Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
