Lillies of the Valley, Kate Middleton's Bridal Bouquet became the polar opposite of the prior princess.

Subtle, understated, yet still very elegant.

Additional Royal Wedding Florals

Fair Trade White Kenya Roses

Prince William proposed to Kate in Kenya which grows this lush hybrid/higher terrain  specialty rose . It is a spectacular rose with an ivory hue. Not used in the bridal bouquet, but in other arrangements through Windson Castle.

David Austin Roses (London) and stephanotis

Cream Daffodils

Symbolizes Prince William and a Royal Signature.

Myrtle

Sprigs from a myrtle bush from the Queens garden or from Queen Victoria's  home on the Isle of Wight  can be pretty much a traditional bet-expect to see it.

Other Favorite and tradidional Royal Family Flowers on the possibility list for The Royal's bridal flowerst:

Cassablanca Lilies-

White Callas

Orchids

Royal Wedding Bridal Bouquet Fun Facts

Trivia derived from 

 April 2009 "Marilyn's Royal Blog:Wedding Bouquets"

www.marilynsroyalblog.com

Queen Victoria (1840)

A small posey of snowdrops-Prince Alberts favorite.

Queen Mary (1893)

Rare white flowers, with the old Province rose 'House of York' predominating. Also included were white orchids, lily-of-the-valley, orange blossom and a new carnation called 'The Bride'.

Queen Elizabeth (1923)

(The Queen Mother)

Some reports indicate that her bouquet was made by Edward Goodyear and included roses, lily-of-the-valley with a white rose on either side. Other reports state that her bouquet was comprised of white roses and heather-created by the Worshipful Company of Gardners. None of her wedding photos actually feature her bridal bouquet as upon entering Westminster Abbey she placed it on the tomb of the unknown soldier.

Queen Elizabeth II (1947)

Supplied by the Worshipful Company of Gardners-and made by Longmans Florist, her bouquet was made up of three types of British-grown orchids: cattleya, odontoglossum, and cypripedium-which a sprig of myrtle was added from a bush at Osborne House: Queen Victoria's house on the Isle of Wight.

Princess Diana (1981)

Longmans Florist created Diana's bouquet as a gift from the Worshipful Company of Gardners-same as Queen Elizabeth II. The bouquet measured over 42 inches long and 15 inches wide in a cascading shower of bridal flowers similar to those in Edwardian times. She set the trend for wedding bouquetts which up to that point were relatively smaller.

Diana's bridal bouquet consisted of  gardenias, stephanotis, freesia, odontoglossum orchid, lily-of-the valley, Earl Mountbatton roses,, hedera (ivy), tradescantia, myrtle, and veronice (hebe).

Buckingham Palace-London

Westminster Abbey