These are the list of flowers and what they mean:
Abecedary - Volubility
Abatina - Fickleness
Acacia - Secret, chaste love
Acanthus - Art
Acalia - Temperance
Aconite - Misanthropy
Agrimony - Thankfulness
Aloe - Grief
Almond - Promise
Amaranth (Globe) - Immortal love
Anemone - Forsaken, Sickness
Angrec - Royalty
Apple-blossom - Preference
Arbor vitae - Everlasting friendship
Balm - Social intercourse or sympathy
Balsamine - Impatience
Bay wreath - Glory
Bee orchid - Industry
Bells of Ireland - Luck
Bird's foot trefoil - Revenge
Box - Constancy
Broom - Humility
Bulrush - Docility
Buttercup - Riches
Cabbage - Profit
Camellia japonica - Unpretending excellence
Campanula - Gratitude
Canterbury Bells - Gratitude
Carnation (pink) - A woman's love
Carnation (white) - Disdain
Carnation (purple) - Capriciousness; whimsical; changeable
Carnation (red) - My heart aches for you
Carnation (yellow) - You have disappointed me; Rejection; disdain
Carnation (striped) - Refusal
Celandine - Joys to come
Cherry blossom - A good education
Cherry blossom - Transience of life (in Japan)
Cherry blossom - Feminine beauty (in China)
Chestnut - Do me justice
China aster - Love of variety
Chrysanthemum (red) - I love
Chrysanthemum (yellow) - Sighted love
Coreopsis - Always cheerful
Cowslip - Winning grace
Clover (red) - Industry
Clover (white) - I promise
Coriander - Lust
Daffodil - Uncertainty, chivalry, respect, or unrequited love
Dahlia - Elegance and dignity
Dandelion - Coquetry
Eglantine Rose - A wound to heal
Elderflower - Compassion
Fennel - Strength
Forget-me-not - True love
Geranium - Gentility
Gorse - Love in all seasons
Grass - Submission
Heliotrope - Devotion
Hollyhock - Ambition
Honeysuckle - Devoted affection, bonds of love
Houseleek - Domestic economy
Ivy - Dependence
Jonquil - Return my affection
Laurestine - A token
Lavender - Devotion, distrust
Lemon-blossom - Discretion
Lettuce - Cold-hearted
Lichen - Solitude
Thank you Wikipedia