Many popular flowers have a unique meaning, below we've listed several. Now you can create a gift with even more meaning!

Amaryllis - Pastoral poetry.
Aster - Daintiness & love. Fidelity.
Azalea - Take care of yourself for me. Fragile passion.
Bells of Ireland - Good luck.
Bittersweet - Truth.
Cactus - Endurance.
Camellia - Admiration. Perfection.
Carnation (general) - Fascination. Love. Distinction.
Carnation (red) - Deep love & affection.
Carnation (pink) - I'll never forget you. A mother's undying love.
Carnation (purple) - Capriciousness.
Carnation (green) - Happy St. Patrick's Day!
Carnation (white) - Sweet & lovely. Innocence. Pure love. Good luck.
Cattail - Peace. Prosperity.
Chrysanthemum - Cheerfulness & rest. You're a wonderful friend.
Chrysanthemum (red) - Love. Good luck & best wishes.
Chrysanthemum (white) - Truth.
Chrysanthemum (yellow) - Slighted love.
Daffodil - Regard. You're the only one.
Daisy - Innocence. Purity. Gentleness. Loyal love.
Delphinium - Open heart. Ardent attachment.
Gardenia - You're lovely. Secret love.
Gladiolus - Remembrance. Sincerity.
Heather - Admiration. Solitude.
Hyacinth (purple) - I'm sorry. Please forgive me.
Hyacinth (pink) - Play.
Hyacinth (white) - Loveliness. I'll pray for you.
Hydrangea - Thank you for understanding.
Iris - Faith. Hope. Wisdom & valor. My compliments.
Ivy - Wedded love. Fidelity. Affection.
Larkspur - Lightness & swiftness.
Lily (general) - Purity of the heart.
Lily (calla) - Beauty.
Lily (tiger) - Wealth.
Lily (white) - Innocence & purity. Sweetness. Majesty.
Lily (yellow) - Gratitude & gaiety.
Lily of the Valley - Sweetness. Return to happiness. Humility.
Magnolia - Nobility.
Mistletoe - Kiss me. Affection. To surmount difficulties.
Orchid - Love. Beauty. Refinement. Wisdom.
Orchid (cattleya) - Mature charm.
Peony - Happy marriage.
Petunia - Your presence soothes me.
Poppy - Eternal sleep. Imagination.
Primrose - I can't live without you.
Rose - Varies based on color, see below.
Snapdragon - Gracious. Fascinating. Protection from evil.
Stock - Bonds of affection. Promptness.
Stephanotis - Happiness in marriage. Desire to travel.
Sunflower - Power. Warmth. Nourishment.
Tulip (general) - Gift from a perfect lover. Love.
Tulip (red) - Irresistible love. Believe me. Declaration of love.
Tulip (yellow) - Hopeless love.
Violet - Faithfulness. Modesty.
Zinnia (mixed) - Thinking of an absent friend.

Roses
The gift of Roses can be the perfect way to convey a variety of emotions, so go ahead and express yourself!

Red: Love, Respect
Pink: Perfect Happiness, Grace and Joy, Please believe me
Dark Pink: Thankfulness
Yellow: Joy, Friendship
White: Innocence and Purity, I am worthy of you, you're in heavenly
Peach: Modesty
Orange: Fascination
Lavender: Enchantment
Red and White together: Unity

Sending a dozen roses: Gratitude
Sending two dozen roses: Congratulations
Sending fifty roses: Unconditional Love