Comparaison

Photos

Potamogeton natans

© GA
Critères
Critère
Potamot nageant
Potamogeton natans
Période floraison ou sporulation
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Rareté Assez commune (AC)
Hauteur mini-maxi 50 - 300 cm
Bord des limbes Echancrures < 20% du limbe
Entier à marge lisse ou scabre
Caractère particulier Présence de stipules ou d'ochréas
Couleur dominante des pièces pétaloides Verdâtre
Brunâtre
Dimension de la fleur en mm Moins de 1 cm
5
Disposition des feuilles Tige aérienne avec feuilles
Alternes
Forme de la tige ou de la hampe florale Tige cylindrique
Lisse ou finement striée
Forme des feuilles indivises Rapport longueur / largeur 1-2
Ovale, oblongue ou obovale
Rapport longueur / largeur > 10
Linéaire
Fréquence Assez commune (AC)
Habitat Lac, étang, rivière
Hauteur maxi de la plante en cm 2 à 5 mètres
300
Hauteur mini de la plante en cm 50
Nombre d'étamines 4
Nombre de pétales ou de tépales 4
Port de la plante Flottante ou submergée
Position de l'ovaire Supère
Structure de la feuille Feuille non découpée
Simple, non découpée
Type biologique Plante aquatique
Flottante
Type d'inflorescence Fleurs regroupées
Epi ou épi composé
Type de fleur Symétrie radiale
Pétales ou tépales libres
Type de fruit Charnu
À un seul noyau (drupe)
Sec indéhiscent
Akène simple
Type de plante Plante herbacée à fleurs
Plante aquatique
Structure des feuilles inférieures Alternes, sans gaines avec une stipule
Type de fruit 2 à 4 akènes à bec très court ou nul
Dimorphisme des feuilles Les inférieures filiformes, les supérieures larges
Nervation des feuilles Plus de 13 nervures parallèles
Opacité des feuilles Des flottantes opaques et longuement pétiolées
Particularité de l'akène Akène sans bosse ventrale
Pédoncule de l'inflorescence Long, supérieur à 2,5 cm et peu renflé
Soudure de la stipule Stipule ouverte
Taille de l'akène 3 à 4,3 mm
> 4,3 mm
Carte des observations
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