Asteraceae
Marsh sowthistle
Sonchus palustris
- Family
- Asteraceae
- Genus
- Sonchus
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Common names
By language (12)
- Catalan
- Laiteron des marais
- Chinese
- 沼生苦苣菜
- Czech
- Mléč bahenní
- Dutch
- Moerasmelkdistel
- English
- Marsh sowthistle, Marsh sow-thistle
- Finnish
- Rantavalvatti
- French
- Laiteron des marais
- German
- Sumpf-Gänsedistel, Sumpfgänsedistel, Laiteron des marais
- Lithuanian
- Laiteron des marais
- Polish
- Mlecz nadwodny
- Romanian
- Susai mare
- Swedish
- Laiteron des marais
Synonyms
- Sonchidium palustre Pomel
- Sonchus inundatus Popov
- Sonchus maritimus Echeand. ex Loscos & J.Pardo
- Sonchus paludosus Gueldenst.
- Sonchus palustris subsp. palustris
- Sonchus palustris var. laevipes Bisch.
- Sonchus sagittatus Moench
- Sonchus sespedalis Gilib.
Flowers
- In flower
- July to August (from 72 flowering iNaturalist observations worldwide)
Characteristics
- Growth habit
- Forb/herb
- Lifespan
- Perennial
- In the US and Canada
- Canada: introduced
Photos
FlowerPhoto: Alexandr Stanislavschi, CC BY 4.0, from iNaturalist 
FlowerPhoto: Vasily Moryashkin, CC BY 4.0, from iNaturalist 
FlowerPhoto: Zeke Marshall, CC BY 4.0, from iNaturalist 
FlowerPhoto: Ina Siebert, CC0, from iNaturalist 
Photo: Анна Митрошенкова, CC BY 4.0, from iNaturalist 
Photo: HermannSchachner, CC0, from Wikimedia Commons 
Photo: Andre Hosper, CC BY 4.0, from iNaturalist 
Photo: HermannSchachner, CC0, from Wikimedia Commons 
Photo: Анна Митрошенкова, CC BY 4.0, from iNaturalist 
Photo: Krzysztof Ziarnek, Kenraiz, CC BY-SA 4.0, from Wikimedia Commons 
Photo: Piermario Maculan, CC0, from iNaturalist 
Photo: Krzysztof Ziarnek, Kenraiz, CC BY-SA 4.0, from Wikimedia Commons
More in Sonchus
- Common sowthistleSonchus oleraceusAsteraceae
- Field sowthistleSonchus arvensisAsteraceae
- Spiny sowthistleSonchus asperAsteraceae
- Slender sowthistleSonchus tenerrimusAsteraceae
- Sonchus fruticosusAsteraceae
- Sea sowthistleSonchus maritimusAsteraceae
- Sonchus acaulisAsteraceae
- Sonchus bulbosusAsteraceae
- Sonchus canariensisAsteraceae
- Sonchus ustulatusAsteraceae
- Sonchus brachyotusAsteraceae
- Sonchus congestusAsteraceae
Sources: classification, synonyms from World Flora Online Plant List (2026-06, CC0 1.0); common names, popularity from Wikidata (2026-10-26, CC0 1.0); common names, US characteristics from USDA PLANTS Database (2025-05-29, CC0 1.0). About our plant data.