Comparaison

Photos

Potamogeton polygonifolius
© GA
Critères
Critère
Potamot à feuilles de renouée
Potamogeton polygonifolius
Période floraison ou sporulation
  • J
  • F
  • M
  • A
  • M
  • J
  • J
  • A
  • S
  • O
  • N
  • D
Rareté Très rare (RR)
Hauteur mini-maxi 20 - 60 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 5 mm
4
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 2-5
Lancéolée
Fréquence Très rare (RR)
Habitat Lac, étang, rivière
Hauteur maxi de la plante en cm 31 à 60 cm
60
Hauteur mini de la plante en cm 20
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
Submergée
Flottante
Type d'inflorescence Fleurs regroupées
Epi ou épi composé
Type de fleur Symétrie radiale
Pétales ou tépales libres
Type de fruit À un seul noyau (drupe)
Charnu
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 lancéolées, 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 < 2,4 mm
Carte des observations
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