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Low toxicity☠️ To avoid💊 Medicinal

💧 Water plantain (European water-plantain)

Alisma plantago-aquatica · Alismataceae

🌳 Temperate Europe
🧠 To remember it“Water plantain: the fake cousin of land plantain” — same name, same family of oval leaves with parallel veins, but an aquatic habitat and a completely different chemical composition that demand caution.
Water plantain (European water-plantain) — Alisma plantago-aquatica

🔍 Identify it without mistakes

An aquatic plant of calm watersides, not to be confused with broadleaf plantain despite its name: its oval-lanceolate leaves with long parallel veins vaguely resemble those of terrestrial plantain, but it grows in shallow water and produces a tall floral stem branched in a pyramid carrying tiny white-pink flowers. The fresh plant is acrid and slightly irritating, not to be eaten raw.

  1. oval-lanceolate leaves in a basal rosette, long-stalked, with parallel convergent main veins
  2. erect flowering stalk, branched in a loose pyramid (panicle), 30-100 cm
  3. small flowers with 3 white-pink petals, opening only in the afternoon
  4. short, fleshy rhizome, acrid to the taste
  5. always grows in shallow water or waterlogged mud, never on dry soil
Size30-100 cm
FloweringJune-September
Habitatpond edges, marshes, ditches, slow-moving rivers with shallow water

⚠️ Not to be confused with

Arrowhead (same habitat, different leaf) (Sagittaria sagittifolia)no fatal confusion, but arrowhead produces edible tubers when cooked, unlike water plantain whose rhizome remains acrid and not recommended

To tell them apart: the leaf of water plantain is a simple oval without the characteristic arrow-shaped lobes of arrowhead

💊 Healing with it

used in traditional Chinese medicine (under the name Alisma orientale, a very close species) as a diuretic for edema and hypertension; the European species has similar popular uses but less scientific documentation

Level of evidence : traditional use — pharmacological compilations (RxList — Water Plantain)

⚠️ the fresh rhizome is acrid and slightly irritating to the digestive mucous membranes when raw; literature remains contradictory regarding its exact toxicity depending on sources — treat with caution and consume only after traditional preparation (drying, cooking), never raw

Sources (2)

No entry replaces a certain identification in the field, or medical advice. When in doubt: don't eat it. If ingestion is suspected: poison control or 112/911.