Comparaison

Photos

Poa palustris

Critères

Critère	Pâturin des marais Poa palustris
Période floraison ou sporulation	J F M A M J J A S O N D
Rareté	Très rare (RR)
Hauteur mini-maxi	50 - 90 cm
Structure de l'épillet	Certains épillets avec plus de 2 fleurons fertiles 3 à 4 fleurons 5 fleurons ou plus
Couleur dominante des pièces pétaloides	Pas de calice ni de corolle
Habitat	Zone humide, tourbière, rives
Nombre de pétales ou de tépales	Aucun pétale
Nombre d'étamines	3
Port de la plante	Tige dressée
Position de l'ovaire	Supère
Inflorescence primaire	Epillet
Pilosité des feuilles inférieures	Glabres
Position de l'arête des lemmes	Absente
Largeur moyenne des feuilles inférieures	2 - 4 mm
Présence d'oreillettes	Pas d'oreillettes
Structure de l'inflorescence générale	Panicule diffuse
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
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
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
Feuille supérieure de la tige	Soit oblique soit plus courte
Partie fertile des étamines (anthère)	De 0,8 à 1,3 mm De 1,3 à 1,8 mm
Type de plante	Plante herbacée à fleurs À feuilles linéaires et longues gaines
Type biologique	Plante terrestre Plante vivace en surface
Disposition des feuilles	Tige aérienne avec feuilles Alternes
Structure de la feuille	Feuille non découpée Simple, non découpée
Forme des feuilles indivises	Rapport longueur / largeur > 10 Linéaire
Bord des limbes	Echancrures < 20% du limbe Entier à marge lisse ou scabre
Type de fleur	Autre Autre (Voir aide)
Dimension de la fleur en mm	Plante à fleurs nues Pièces florales absentes ou transformées en soies
Type d'inflorescence	Fleurs regroupées Epi ou épi composé
Type de fruit	Sec indéhiscent Caryopse
Forme de la tige ou de la hampe florale	Tige cylindrique Lisse ou finement striée
Structure de la semence	1 seul fleuron Fleuron muni d'une baguette

Carte des observations

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