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
Habitat
Zone humide, tourbière, rives
Port de la plante
Tige dressée
Couleur dominante des pièces pétaloides
Pas de calice ni de corolle
Brunâtre
Nombre de pétales ou de tépales
Aucun pétale
Position de l'ovaire
Supère
Aspect de la semence
Akène libre
Détail de l'inflorescence
Terminale en tête simple d'épis (capitule)
Disposition des feuilles sur les rejets
Feuilles disposées sur 3 rangs
Particularité des fleurs
Plante à fleurs hermaphrodites
Périgone et semence
Absent ou à soies très courtes < 0,5 mm
Nombre de stigmates
3
Aspect de l'inflorescence
Tête noire encadrée par 2 écailles coriaces
Nombre d'étamines
3
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
  • Akène simple
Forme de la tige ou de la hampe florale
Tige cylindrique
  • Lisse ou finement striée
Ecailles des épis (Bractées florales)
Disposition distique
  • Plus de 2 stériles à la base
Carte des observations
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