Comparaison

Photos

Schoenus nigricans
© GA
Critères
Critère
Choin noirâtre
Schoenus nigricans
Période floraison ou sporulation
  • J
  • F
  • M
  • A
  • M
  • J
  • J
  • A
  • S
  • O
  • N
  • D
Rareté Extrêmement rare (RRR)
Hauteur mini-maxi 30 - 60 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
Brunâtre
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 Extrêmement rare (RRR)
Habitat Zone humide, tourbière, rives
Hauteur maxi de la plante en cm 31 à 60 cm
60
Hauteur mini de la plante en cm 30
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 libre
Disposition des feuilles sur les rejets Feuilles disposées sur 3 rangs
Détail de l'inflorescence Terminale en tête simple d'épis (capitule)
Ecailles des épis (Bractées florales) Disposition distique
Plus de 2 stériles à la base
Nombre de stigmates 3
Particularité des fleurs Plante à fleurs hermaphrodites
Périgone et semence Absent ou à soies très courtes < 0,5 mm
Aspect de l'inflorescence Tête noire encadrée par 2 écailles coriaces
Carte des observations
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