Comparaison

Photos

Ambrosia artemisiifolia

Critères

Critère	Ambroise élevée Ambrosia artemisiifolia
Période floraison ou sporulation	J F M A M J J A S O N D
Rareté	Très rare (RR)
Hauteur mini-maxi	30 - 100 cm
Type d'inflorescence	Fleurs regroupées Capitule
Couleur dominante des pièces pétaloides	Jaunâtre Verdâtre
Nombre de pétales ou de tépales	Capitule
Port de la plante	Tige dressée
Habitat	Prairie, pelouse Terrain vague, chemin
Nombre d'étamines	5
Position de l'ovaire	Infère
Disposition des capitules	Autres disposition des capitules
Position des épines	Plante ne possédant pas d'épine
Couleur du capitule	À une seule couleur
Présence d'écailles sur le capitule	Réceptacle nu ou pubescent entre les fleurs
Présence de lait dans la plante	Absence de lait
Type d'akène	Pappus formé d'une couronne écailleuse
Division des feuilles inférieures	Deux fois divisée à bande médiane étroite
Fleurs femelles	Semences isolées enfermant une seule fleur nue
Inflorescences mâles	Plante terminée par une grappe de capitules mâles
Type de plante	Plante herbacée à fleurs Autre plante herbacée à fleur
Type biologique	Plante terrestre Plante annuelle
Disposition des feuilles	Tige aérienne avec feuilles Opposées
Structure de la feuille	Feuille plus ou moins découpée Pennée et plus profondément découpée
Forme des feuilles indivises	Feuilles découpées ou composées Feuilles découpées ou composées
Bord des limbes	Echancrures >20% du limbe Lobé ou découpé
Type de fleur	Symétrie radiale Pétales ou tépales soudés Autre Autre (Voir aide)
Dimension de la fleur en mm	Plante à fleurs nues Pièces florales absentes ou transformées en soies Moins de 5 mm 3 Moins de 1 cm 5
Type de fruit	Sec indéhiscent Akène simple
Forme de la tige ou de la hampe florale	Tige cylindrique Lisse ou finement striée
Composition du capitule	Fleurs en tube uniquement Le tube se termine par 5 dents courtes

Carte des observations

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