Most "Impatiens" species are perennial herbs. However, several annual species exist, especially in the temperate regions as well as in the Himalayas. A few "Impatiens" species in southeast Asia (e.g. "Impatiens kerriae" or "Impatiens mirabilis") form shrubs or small trees up to three meters tall. Most "Impatiens" species occur in forests, especially along streams and paths or at the forest edge with a little bit of sunlight. Additionally, a few species occur in open landscapes, such as heathland, river banks or savanna.