Comparaison

Photos

Potamogeton perfoliatus

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Critères
Critère
Potamot à feuilles perfoliées
Potamogeton perfoliatus
Période floraison ou sporulation
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Rareté Extrêmement rare (RRR)
Hauteur mini-maxi 50 - 200 cm
Bord des limbes Echancrures < 20% du limbe
Entier à marge lisse ou scabre
Entier à marge ondulée
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
Orbiculaire
Rapport longueur / largeur 1-2
Cordée
Fréquence Extrêmement rare (RRR)
Habitat Lac, étang, rivière
Hauteur maxi de la plante en cm 1 à 2 mètres
200
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
Submergée
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 Toute larges, sessiles et submergées
Nervation des feuilles Plus de 13 nervures parallèles
Opacité des feuilles Des submergées translucides et sessiles
Particularité de l'akène Akène sans bosse ventrale
Pédoncule de l'inflorescence Long, supérieur à 2,5 cm et renflé au sommet
Soudure de la stipule Stipule ouverte
Taille de l'akène 3 à 4,3 mm
Carte des observations
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