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Guide botanique

Watermeal.

Wolffia globosa

Prononciation WOL-fee-uh glo-BO-suh

Aussi appelée Asian Watermeal

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Watermeal
Photo de Andrey Zharkikh (CC BY) via iNaturalist

Watermeal is a tiny, rootless aquatic plant that floats on the surface of still water. It is actually one of the smallest flowering plants on the planet. You will often find it growing in dense mats alongside other duckweed species.

Une autre photo de Watermeal
Photo de chiuluan (CC BY) via iNaturalist

En un coup d'œil

Niveau d'entretien
Moyenne
Type de plante
Aquatic floating plant
Lumière
Partial shade to full sun
Lumière en intérieur
Lumière vive indirecte
Arrosage
Tous les 0 jours
Taille adulte
1 millimeter
Croissance
Rapide
Rusticité
USDA 9 à 11
Floraison
Rarely blooms, typically in summer

Entretien

Keep this plant in a container with still water that has plenty of nutrients. Watch for the water turning stagnant or losing clarity, which can signal a need for a partial water change. Ensure it gets plenty of light to keep the colonies thriving.

Arrosage
This plant lives entirely submerged or floating in water.
Engrais
Add a small amount of liquid aquatic fertilizer if the water lacks nutrients.
Taille
Scoop out excess plants with a net to prevent them from covering the entire water surface.
Rempotage
Repotting is not applicable as this plant does not grow in soil.
Sol
None, aquatic
pH du sol
6.0 to 7.5
Température
15 à 30°C
Humidité
70 à 100%
Résistance à la sécheresse
Faible
Durée de vie
Perennial, indefinite with proper water conditions
Résistance aux chevreuils et lapins
Moyenne

Signes qu'il faut rempoter

  • Water surface becomes overcrowded
  • Growth rate slows significantly

Sécurité

Humains
This plant is generally considered safe and is consumed as a vegetable in parts of Southeast Asia.
Enfants
Due to its tiny size, it poses a minor choking hazard if ingested in large quantities by very small children.
Comestibilité
Ensure the water source is clean and free of contaminants before considering consumption, as this plant readily absorbs heavy metals.

Comment l'identifier

  • Tiny green granular floating fronds
  • Lacks any visible roots
  • Individual plants are pinhead sized
  • Forms dense mats on water
  • Rarely produces visible flowers
Hauteur
0 à 0,01m
Envergure
0 à 0,01m
Feuilles
bright green, deciduous
Fleurs
white, 0,1 à 0,2cm

Problèmes courants

  • Algal bloom — Excessive nutrients can cause algae to outcompete the duckweed.

La cultiver

Multiplication
division
Quand planter
spring, summer
Hivernage
Move containers indoors to a bright, frost free location if temperatures drop below freezing.
En pot
Excellent for small bowls or ponds, provided the water is kept still.

Division

  1. 1. Scoop a small portion of the plants from the surface.
  2. 2. Place the portion into a new container with nutrient rich water.
  3. 3. Ensure the water remains still to encourage rapid growth.

Keep the water surface clear of debris to allow maximum light penetration for growth.

Bonnes associations

  • Eichhornia crassipes — They share similar aquatic requirements.

Espèces similaires

  • Duckweed — It is a related floating plant but significantly larger.

Science

Famille
Araceae
Genre
Wolffia
Ordre
Alismatales
Classe
Liliopsida
Région d'origine
Tropical and subtropical regions worldwide.
Préservation
Not of conservation concern as it is a prolific grower in suitable aquatic environments.

It thrives in still or slow moving nutrient rich waters where it forms dense mats.

Intérêt pour la faune
provides cover for small aquatic organisms, oxygenates water
Utilisations
aquatic food source, water purification, ornamental pond plant

Au fil des saisons

JFMAMJJASOND
Floraison
Fructification
Feuillage

Repères écologiques

Salinité
1/9
Réaction du sol
6/9
Lumière
7/9
Température
8/9
Humidité
9/9
Nutriments
8/9

Taxonomie vérifiée avec le GBIF.

Ce qu'on demande souvent

Does it need soil?
No, it is a free floating aquatic plant.
How fast does it grow?
It can double its population in just a few days under ideal conditions.

D'où vient le nom

The genus is named after the German botanist Johann Friedrich Wolff, while globosa refers to its spherical shape.

Bon à savoir

  • It lacks roots entirely.
  • It is often called water meal.
  • It has a very high protein content.
  • It reproduces primarily through budding.

Ta plante a mauvaise mine ?

Cette page est un guide général. Pocket Botanist diagnostique les problèmes directement à partir d'une photo de ta plante, adapte l'arrosage à sa luminosité et te prévient quand il faut t'en occuper.

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Ce guide a été généré par IA et vérifié avec la taxonomie du GBIF. Il s'agit d'informations générales, et non de conseils horticoles ou vétérinaires. Découvre comment nous concevons ces guides.