General description:- Herbs.

Leaves:- Simple, exstipulate.

Flowers:-
1) Solitary or in racemes, hermaphrodite, strongly zygomorphic.
2) Sepals,, usually 3, free.
3) Petals, 5, the 4 lower connate in 2 lateral pairs.
4) Stamens, 5, alternate with petals.
5) Anthers, connate.
6) Ovary, superior, 5-celled;
    a) ovules, anatropous, axile, numerous uniseriate in each cell.
7) Stigma, sessile, 5-toothed.

Fruit:-
1) Capsule, loculicidal, valves 5, dehiscing elastically and coiling.
2) Seeds, without endosperm.

Genus:- Impatiens

1) Sepals, 3:
    a) lowest, large, petaloid, saccate, usually spurred.
    b) lateral, small, ovate, usually green.
2) Petals,
    a) upper, largest, each lateral pair connate except for 2 apical lobes.