Oldenlandia lancifolia
Oldenlandia lancifolia , herbacée introduite en Guyane, s'appuyant ici sur les autres plantes de bas-fond pour atteindre jusqu'à 1 m de haut, feuilles sessiles linéaires mesurées jusqu'à 27 x 2,5 mm, inflorescences axillaires = souvent une fleur (parfois 2) pédonculée(s), pédoncule mesuré jusqu'à 12,5 mm, fleurs de type 4 à calice vert/rougeâtre à lobes triangulaires et corolle blanche, fruit = capsule hémisphérique (environ 3 mm de diamètre) prolongée par les lobes dressés du calice.
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