Non-Edible Flowers

Just for reference, here is a list of poisonous flowers. There are a lot that are not edible. Just be careful which flowers you use on your cake. Some of them can sit on the cake, just make sure the caterers know to take all the flowers off before serving.

Poisonous Plants and Flowers
Common Name	Botanical Name
Aconite (wolfsbane, monkhood)	Aconitum spp.
Anemone (windflower)	Anemone spp.
Anthurium	Anthurium spp.
Atamasco lily	Zephyranthes spp.
Autumn crocus	Colchicum autumnale
Azalea	Azalea spp. (Rhododendron spp.)
Baneberry	Actaea spp.
Black locust	Robinia pseudo-acacia
Bloodroot	Sanguinaria canadensis
Boxwood	Buxus spp.
Burning bush (strawberry bush, spindle tree, wahoo)	Euonymus spp
Buttercup	Ranunculus spp.
Butterfly weed	Asclepias spp.
Caladium	Caladium spp.
Calla (calla lily)	Calla palustris (Zantedeschia aethiopica)
Carolina jasmine (yellow jessamine)	Gelsemium sempervirens
Castor bean	Ricinus communis
Cherry laurel	Prunus caroliniana
Chinaberry (bead tree)	Melia azedarach
Christmas rose	Helleborus niger
Clematis	Clematis spp.
Daffodil	Narcissus spp.
Deadly nightshade (belladonna)	Atropoa belladona
Death cammas (black snakeroot)	Zigadenus spp.
Delphinium (larkspur)	Delphinium spp.
Dogbane	Apocynum androsaemifolium
Dumbcane	Dieffenbachia spp.
Elephant ears	Colocasia antiquorum
False hellebore	Veratrum viride
Four o'clock	Mirabills jalapa
Foxglove	Digitalis purpurea
Giant elephant ear	Alocasia spp.
Gloriosa lily	Glonosa superba
Golden chain tree (laburnum)	Labunum anagryroides
Goldenseal	Hydrastis canadensis
Heavenly bamboo (nandina)	Nandinaa domestica
Henbane (black henbane)	Hyoscyamus niger
Horse chestnut (Ohio buckeye)	Aesculus spp.
Horse nettle	Solanum spp.
Hyacinth	Hyacinthus orientalis
Hyacinth bean	Dolicbos lab lab
Hydrangea	Hydrangea spp.
Iris	Iris spp.
Ivy (English ivy)	Hedera helix
Jack-in-the-pulpit	Arisaemia triphyllum
Jerusalem cherry	Solanum pseudocapsicum
Jessamine (jasmine)	Cestrum spp.
Jetbead (jetberry)	Rhodotypos tetrapetala
Jimson weed	Datura spp (Brugmansia spp.)
Jonquil	Narcissus spp.
Kentucky coffee tree	Gymnocladus dioica
Lantana	Lantana camara
Leopard's bane	Arnica montana
Lily of the valley	Convallaria majalis
Lobelia (cardinal flower, Indian tobacco)	Lobelia spp.
Marsh marigold	Caltha palustris
May apple (mandrake)	Podophyllum peltatum
Mescal bean (Texas mountain laurel, frijo lillo)	Sophora secundiflora
Mistletoe	Phoradendron spp.
Morning glory	Ipomoea violacea
Mountain laurel	Kalmia latifolia
Nightshade	Solanum spp.
Oleander	Nerium oleander
Periwinkle (myrtle, vinca)	Vinca spp.
Philodendron	Philodendron spp. (Monstera spp.)
Pittosporum	Pittosporum spp.
Poison hemlock	Conium maculatum
Potato	Solanum tuberosum
Privet	Ligustrum spp.
Rhododendron	Rhododendron spp.
Rock poppy (celandyne)	Chelidonium majus
Schefflera	Schefflera spp.
Spring adonis	Adonis vernalis
Spurge	Euphorbia spp.
Star of Bethlehem	Ornithogalum umbellatum
Sweet pea	Lathyrus spp.
Tobacco	Nicotiana tabacum
Trumpet flower (chalice vine)	Solandra spp.
Water hemlock	Cicuta maculata
Wild cherry (black cherry)	Prunus serotina
Wisteria	Wisteria spp.
Yellow allamanda	Allamanda cathartica
Yellow oleander (tiger apple, be still tree, lucky nut)	Thevetia peruviana
Yesterday-today-and-tomorrow	Brunfelsia spp.