The leaves of Catharanthus roseus are membranous, obovate oblong, 3 to 4 cm long and 1.5 to 2.5 cm wide. The apex of the leaves is round and has a short tip. The base of the leaves is broadly cuneiform or cuneiform, and the base will gradually narrow the petiole.
The leaves of Impatiens are alternate. The leaves are lanceolate, oblanceolate or narrowly elliptic. They are about 4 to 12 cm long and 1.5 to 3 cm wide. They are wedge-shaped at the base and sharp serrated at the edge.
The flower cymes of Catharanthus roseus are axillary or terminal, with 2 to 3 flowers, calyx with 5 deep split, corolla in the shape of saucer with high feet, red, lavender, white, etc.
The flowers of Impatiens are solitary or 2 to 3 in clusters at the axils of leaves, without total pedicels. The flowers are white, purple or pink, single or double.
