Impatiens means impatient, referring to the seed pod’s habit of bursting open. Walleriana for Horace Waller, 19th century missionary in central Africa.
Impatiens is popular as it blooms reliably in heavy shade, not a common feature.
Sometimes an annual but also perennial, impatiens grows to nearly a metre, often less, with weak, succulent, hairless stems.
Leaves are simple, alternate, elliptical to ovate. Sometimes the upper leaves are opposite. Petioles are quite long. The leaf margins are variable, sometimes entire, other times toothed.
Flowers can be pink (usually), red, orange, white, purple. They have five petals and a characteristic spur to about 3 cm.
Photo: Matt Tomkins