Comparaison

Photos

Carex leersii
© GA
Critères
Critère
Laîche de Leers
Carex leersii
Période floraison ou sporulation
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Rareté None
Hauteur mini-maxi 20 - 50 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 anguleuse
Trigone
Forme des feuilles indivises Rapport longueur / largeur > 10
Linéaire
Habitat Prairie, pelouse
Hauteur maxi de la plante en cm 31 à 60 cm
50
Hauteur mini de la plante en cm 20
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
Akène simple
Type de plante Plante herbacée à fleurs
À feuilles linéaires et longues gaines
Aspect de la semence Akène enfermé dans une boîte (utricule)
Disposition des feuilles sur les rejets Feuilles disposées sur 3 rangs
Détail de l'inflorescence Terminale en épi d'épis
Ecailles des épis (Bractées florales) Disposition en hélice
à 2 stériles à la base
Nombre de stigmates 2
Particularité des fleurs Plante monoïque
Périgone et semence Absent ou à soies très courtes < 0,5 mm
Aspect de la première feuille bractéale Non engainante et écailleuse ou filiforme
Taille inférieure à l'épi
Taille > à l'épi, < à l'inflorescence
Bec de l'utricule Entre 0,5 et 2 mm
Entre 0,5 et 1 mm
Biologie de la plante Cespiteuse formant une touffe bien délimitée
Couleur des feuilles Au moins la face supérieure bien verte
Couleurs des écailles en début de fructification Verdâtres ou blanchâtres
Brunes ou roussâtres à bord membraneux étroit
Densité des fleurs femelles sur les épis Epis denses depuis leur base
Distance entre les deux épis inférieurs Moins de 1,5 cm
1,5 à 3 cm
Forme des écailles Ovale aristée ou acuminée
Largeur des feuilles 2 à 3 mm
3 à 5 mm
Ligule et anti-ligule Absence d'anti-ligule, hauteur de la "ligule"
Ligule comprise entre 1 et 2 mm
Longueur de l'inflorescence 3 à 8 cm
Longueur des pédoncules inférieurs Épis inférieurs sessiles
Longueur des épis inférieurs Inférieure à 1 cm
Marges de l'utricule Non ailées et scabres
Nervation de l'utricule à maturité Nervation absente ou peu visible
Pilosité de la plante Glabre
Pilosité du dos des utricules Glabre
Position des utricules par rapport à l'axe Dressée
Taille de l'utricule 4 à 5 mm
Type d'inflorescence Épi d'épis peu différenciés (homostachyés)
Epis homogènes, tous femelles à leur base
Carte des observations
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