Language of flowers

The language of flowers was huge in the Victorian era but is still used today. The meanings can vary depending on the colour as well as the flower. The meaning of flowers also varies across the world. 
Here is a brief list of some of the many flowers we use and the reasons behind them.

Roses
Pink roses show grace and appreciation white roses, express purity, peace, and innocence.
Yellow Roses friendship dark pink roses are an expression of gratitude and thankfulness to the deceased for their contributions prior to passing.
Forget- me - nots their memory will live on
Lily of the Valley- return of happiness
Lily
White Lilies are a traditional symbol of hope and encouragement. They also symbolise the purity of the soul who recently passed and their everlasting innocence.
Tulips and Daffodils
Being spring flowers they symbolise renewal, encouragement, and hope for the future.
Lisianthus (Eustoma)-appreciation
Daisy-innocence
Carnations
Pale red denotes admiration
Dark red conveys feelings of deep love and affection
Pink carnation flower meanings include gratitude and the concept of never forgetting someone.
Yellow carnation bloom expresses the idea of rejection and disappointment with someone. (These may be one to avoid)

Chrysanthemums in general represent trust, friendship and loyalty. 
Red for love. White for innocence

Foliage specifically for funerals:
Cypress- mourning 
Rosemary- remembrance
Ivy- attachment
Moss- Maternal love
Evergreen symbolises immortality