Impatiens walleriana (syn.Impatiens sultanii), also known as busy Lizzie (United Kingdom), balsam, sultana, or simply impatiens, is a species of the genusImpatiens, native to eastern Africa from Kenya to Mozambique. It is a flowering herbaceousperennial plant growing to 15–60 cm (6–24 in) tall, with broad lanceolateleaves 3–12 cm long and 2–5 cm broad. Leaves are mostly alternate, although they may be opposite near the top of the plant. The flowers are profusely borne, 2–5 cm diameter, with five petals and a 1 cm spur. The seedpod explodes when ripe in the same manner as other Impatiens species, an evolutionary adaptation for seed dispersal. The stems are semi-succulent, and all parts of the plant (leaves, stems, flowers, roots) are soft and easily damaged.
Although perennial in frost-free growing conditions, it is usually treated as a half-hardy annual in temperate regions (though pot-grown plants can be successfully overwintered indoors). It is commonly cultivated in parks and gardens, typically grown in containers but also in bedding schemes. Propagation is by seed or stem cuttings (which often root readily in water). Numerous cultivars in a range of colours from white to purple, are widely available commercially, either as seeds or young plants. They include the following:-
Super Elfin series is the dominantly available commercial cultivar group. This group of impatiens was bred by Claude Hope in Costa Rica. Mr. Hope developed this species from its native wild form into one of the most popular bedding plants in the world.
Perennial herb, 30 - 60 cm. Leaves spirally arranged, variable in shape and size, mostly hairless, slightly fleshy, dark green to reddish green; margins crenate-serrulate, often with hairs at the apex of the crenations. Flowers in few-flowered axillary or terminal clusters, variable in colour from pink to deep violet, rarely white; lateral petals very deeply lobed as to appear nearly separate. Spur up to 4 cm, slender, curved.