Comparaison

Comparer plusieurs plantes en visualisant leurs photos, leurs critères distinctifs ou communs, et leur répartition géographique selon les connaissances actuelles.

Photos (clic pour agrandir)

Laîche à bec
Carex rostrata

Critères (➡️)

Critère	Laîche à bec Carex rostrata
Période floraison ou sporulation	J F M A M J J A S O N D
Rareté	Extrêmement rare (RRR)
Hauteur mini-maxi de la plante	30 - 80 cm
Type de plante	À feuilles linéaires et longues gaines
Port de la plante	Tige dressée
Habitat	Zone humide, tourbière, rives
Type biologique	Plante vivace souterraine
Disposition des feuilles	Alternes
Structure de la feuille	Simple, non découpée
Forme des feuilles indivises	Linéaire
Bord des limbes	Entier à marge lisse ou scabre
Type de fleur	Autre (Voir aide)
Dimension de la fleur en mm	Pièces florales absentes ou transformées en soies
Position de l'ovaire	Supère
Couleur dominante des pièces pétaloides	Pas de calice ni de corolle
Nombre de pétales ou de tépales	Aucun pétale
Type d'inflorescence	Epi ou épi composé
Nombre d'étamines	3
Type de fruit	Utricule (Cypéracées)
Forme de la tige ou de la hampe florale	Trigone
Disposition des feuilles sur les rejets	Feuilles disposées sur 3 rangs
Particularité des fleurs	Plante monoïque
Aspect de la semence	Akène enfermé dans une boîte (utricule)
Détail de l'inflorescence	Terminale en grappe d'épis
Périgone et semence	Absent ou à soies très courtes < 0,5 mm
Ecailles des épis (Bractées florales)	à 2 stériles à la base
Nombre de stigmates	3
Biologie de la plante	Rhizomateuse formant une population dispersée
Pilosité de la plante	Glabre
Type d'inflorescence	Plusieurs épis terminaux entièrement mâles
Longueur de l'inflorescence	Supérieure à 20 cm 8 à 20 cm
Couleur des feuilles	Glauques (vert grisâtre bleuté) sur les deux faces
Densité des fleurs femelles sur les épis	Epis denses depuis leur base
Aspect de la première feuille bractéale	Taille > à l'inflorescence
Largeur des feuilles	2 à 3 mm 3 à 5 mm
Ligule et anti-ligule	Ligule mesurant entre 4 et 8 mm
Longueur des épis inférieurs	4 à 7 cm Supérieure à 7 cm
Taille de l'utricule	5 à 7 mm 4 à 5 mm
Bec de l'utricule	Entre 1 et 1,5 mm
Pilosité du dos des utricules	Glabre
Nervation de l'utricule à maturité	Nervation nette
Marges de l'utricule	Non ailées et lisses
Position des utricules par rapport à l'axe	Dressée
Couleurs des écailles en début de fructification	Verdâtres ou blanchâtres
Forme des écailles	Ovale aristée ou acuminée
Longueur des pédoncules inférieurs	2 à 4 cm Supérieur à 4 cm 1 à 2 cm
Distance entre les deux épis inférieurs	8 à 12 cm 5 à 8 cm

Carte des observations

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Avertissement : La carte présentée ne correspond qu'à l'état actuel des connaissances et ne peut être considérée comme exhaustive. Cette carte est une retranscription en temps réel des contributions de chacun sur la base de données et toute nouvelle donnée est à ce titre intéressante, même pour les espèces les plus communes.
Copyright © : Geonat'ÎdF - Lobelia

Comparaison

Photos (clic pour agrandir)

Laîche à bec Carex rostrata

Critères (➡️)

Carte des observations

Laîche à bec
Carex rostrata