Phi Gamma Pi's flower is the ivory rose.

The Nineteenth Century French rose, General Jacqueminot, a deep red rose, was chosen as the flower of Alpha Omicron Pi because its color is the symbol of the central and essential virtue of the Fraternity. Its choice had no connection with any legend, poem or story. This strong red rose, with its overtones of courage and vigor, was selected for its richness of color and fragrance, combines with softness and modesty of bearing. The Jacqueminot Rose is not available at most florists, so any deep red rose which is available may be used.

Delta Sigma Theta's flower is the African Violet

D Phi E's flower is the lovely purple iris. :)

Like DolphinChica said, the Tri Delta flower is simply the pansy -- no colors specified. I've seen some Greek websites listing it as the "blue and gold pansy" but that isn't the case.

Kappa Delta's flower is the white rose @----->-------

why does ASA have a flower they use in the spring and a flower they use in the fall?

Because they are not year round flowers like roses or carnations.

Gamma Sig's flower is also the white rose.

Hmm...I never really knew that... I guess I never really thought about that... guess even Alums can learn something new! Hehe

The flower for Sigma Gamma Rho is the yellow tea rose.