There are different African Violet flower shapes, these include single, semi-double, double, frilled, fluted, star, wasp and cup. They are defined as below:
Single African Violet Flower Type:
Single flowers have total five petals, top two petals are smaller than the below three petals.
Semi-Double African Violet Flower Type:
Semi-double flowers have between 5-10 petals. They have an extra crest or tuft of flowers in the center which tend to curl and do not open up into full size petals.
Double African Violet Flower Type:
Double flowers have more than 10 full size petals which cover over the center set of anthers.
Frilled African Violet Flower Type:
Frilled flowers can be either single, semi-double or double in type and have a frilled /lacy/convoluted/ruffled edge along the petal borders.
Fluted Petal African Violet Flower type:
These flowers have a slightly curved indentation at the tip of the petals.
Star African Violet Flower Shape:
Star flowers have all 5 petals equal in size and evenly spaced.
Wasp African Violet Flower Shape:
Wasp flowers have 5 petals total; all of these petals are narrow. However, the top two petals are much smaller, narrower and twisted.
Cup Shaped African Violet Flower Shape:
These flowers are star shaped and have all petals joined together to form a shallow cup like center.
Bell Shaped African Violet Flower Type:
These flowers similar to the cup shape have all petals joined together to form a narrow bell shape.