Abstract
The demographic development, the trade exchanges as well as the increasing human needs represent a major threat tobiodiversity. These phenomena caused the extinction of a large number of plant species creating ecological conditionsfavourable to the appearance of new species harmful to the native ones. In fact, the lands and forests of the Lesser Antil-les have gradually been damaged, resulting in regressive forests. In Martinique, the forests undergo a significant degreeof anthropization facilitating the installation of invasive species. Triphasia trifolia is one of these invasive species. Intro-duced from Southeast Asia as an ornamental plant, the species has become naturalized and colonizes the coastal areasto the detriment of indigenous populations. Inventories in the xeric south of Martinique (the commune of Vauclin), allowedus to decipher the main life characteristics of Triphasia trifolia. (