Comparaison

Photos

Poa palustris
© GA
Critères
Critère
Pâturin des marais
Poa palustris
Période floraison ou sporulation
  • J
  • F
  • M
  • A
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  • J
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  • A
  • S
  • O
  • N
  • D
Rareté Très rare (RR)
Hauteur mini-maxi 50 - 90 cm
Bord des limbes Echancrures < 20% du limbe
Entier à marge lisse ou scabre
Couleur dominante des pièces pétaloides Pas de calice ni de corolle
Dimension de la fleur en mm Plante à fleurs nues
Pièces florales absentes ou transformées en soies
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 > 10
Linéaire
Fréquence Très rare (RR)
Habitat Zone humide, tourbière, rives
Hauteur maxi de la plante en cm 61 cm à 1 mètre
90
Hauteur mini de la plante en cm 50
Nombre d'étamines 3
Nombre de pétales ou de tépales Aucun pétale
Port de la plante Tige dressée
Position de l'ovaire Supère
Structure de la feuille Feuille non découpée
Simple, non découpée
Type biologique Plante terrestre
Plante vivace en surface
Type d'inflorescence Fleurs regroupées
Epi ou épi composé
Type de fleur Autre
Autre (Voir aide)
Type de fruit Sec indéhiscent
Caryopse
Type de plante Plante herbacée à fleurs
À feuilles linéaires et longues gaines
Inflorescence primaire Epillet
Largeur moyenne des feuilles inférieures 2 - 4 mm
Pilosité des feuilles inférieures Glabres
Position de l'arête des lemmes Absente
Présence d'oreillettes Pas d'oreillettes
Structure de l'inflorescence générale Panicule diffuse
Structure de l'épillet Certains épillets avec plus de 2 fleurons fertiles
3 à 4 fleurons
5 fleurons ou plus
Structure de la semence 1 seul fleuron
Fleuron muni d'une baguette
Taille de l'épillet 3 - 4 mm
Taille de la glume supérieure Nettement dépassée par les fleurons
Type de ligule Membraneuse glabre ou courtement ciliée
Détail de la biologie En touffe dense et sans bulbes
Stolons souterrains ou rhizomes
Feuille supérieure de la tige Soit oblique soit plus courte
Forme de la tige Ronde à faiblement comprimée
Forme du limbe des feuilles Plié en deux, seule la nervure médiane saillante
Ligule des feuilles supérieures Allongée, obtuse ou arrondie
Orientation des rameaux à maturité Tous étalés, dressés
Partie fertile des étamines (anthère) De 0,8 à 1,3 mm
De 1,3 à 1,8 mm
Pilosité et nervation des lemmes 3 nervures saillantes et poils laineux à la base
Premier noeud de l'inflorescence Plus de 2 rameaux à la base de la panicule
Carte des observations
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