Exacum

Exacum is a genus of flowering plants in the family Gentianaceae, native to tropical Asia, Africa, and Madagascar. The genus comprises both annual and perennial herbaceous plants.

Description

Exacum species are characterized by their attractive, often fragrant flowers, which come in shades of blue, purple, pink, and white. The flowers typically have five petals and prominent yellow stamens. The leaves are usually opposite and ovate or lanceolate in shape. The plants range in size depending on the species, with some reaching heights of only a few inches while others can grow taller.

Cultivation

Several Exacum species are cultivated as ornamental plants, particularly Exacum affine, commonly known as Persian Violet or German Violet. These plants are prized for their compact size and profuse blooms. They are typically grown as indoor plants and are popular for their long flowering period. They prefer bright, indirect light and well-draining soil.

Distribution and Habitat

Exacum species are found in a variety of habitats, including grasslands, forests, and rocky slopes. Their distribution spans tropical regions of Asia, Africa, and Madagascar, reflecting their adaptation to warm climates.

Taxonomy

The genus Exacum belongs to the Gentianaceae family. The classification of species within the genus has been subject to revision, and further research may lead to taxonomic changes.