Toxic Plants

Aloe
- Amaryllis
- Andromeda Japonica
- Asian Lily (Liliaceae)
- Asparagus Fern
- Australian Nut
- Autumn Crocus
- Avocado
- Azalea

B
- Bird of Paradise
- American Bittersweet
- European Bittersweet
- Branching Ivy
- Buckeye
- Buddist Pine

C
- Caladium
- Calla Lily
- Castor Bean
- Ceriman (aka Cutleaf Philodendron)
- Charming
Diffenbachia
- Chinaberry Tree
- Chinese Evergreen
- Christmas Rose
- Clematis
- Cordatum
- Corn Plant (aka Cornstalk Plant)
- Cornstalk Plant (aka Corn Plant)
- Cutleaf Philodendron (aka Ceriman)
- Cycads
- Cyclamen

D
- Daffodil
- Day Lily
- Devil's Ivy
- Dumb Cane
- Deadly Nightshade (See Nightshade)

E
- Easter Lily
- Elephant Ears
- Emerald Feather (aka Emerald Fern)
- Emerald Fern (aka Emerald Feather)
- English Ivy

F
- Fiddle-Leaf Philodendron
- Flamingo Plant
- Florida Beauty
- Foxglove
- Fruit Salad Plant

G
- Glacier Ivy
- Gladiolas
- Glory Lily
- Gold Dieffenbachia
- Gold Dust Dracaena
- Golden Pothos
- Green Gold Nephthysis

H
- Hahn's self branching English Ivy
- Heartleaf Philodendron
- Heavenly Bamboo
- Holly
- Horsehead Philodendron
- Hurricane Plant
- Hyacinth
- Hydrangea

I
- Iris

J
- Japanese Show Lily
- Japanese Yew (aka Yew)
- Jerusalem Cherry
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K
- Kalanchoe

L
- Lace Fern
- Lacy Tree
- Lily of the Valley

M
- Macadamia Nut
- Madagascar Dragon Tree
- Marble Queen
- Marijuana
- Mauna Loa Peace Lily (aka Peace Lily)
- Mexican Breadfruit
- Mistletoe "American"
- Morning Glory
- Mother-in-Law

N
- Narcissus
- Needlepoint Ivy
- Nephthytis
- Nightshade

O
- Oleander
- Onion
- Orange Day Lily

P
- Panda
- Peace Lily (aka Mauna Loa Peace Lily)
- Philodendron Pertusum
- Plumosa Fern
- Precatory Bean

Q
- Queensland Nut

R
- Red Emerald
- Red Lily
- Red-Margined Dracaena (aka Straight-Margined Dracaena)
- Red Princess
- Rhododendron
- Ribbon Plant (Dracaena sanderiana)
- Rubrum Lily

S
- Saddle Leaf Philodendron
- Sago Palm
- Satin Pothos
- Schefflera
- Spotted Dumb Cane
- Stargazer Lily
- Striped Dracaena
- Sweetheart Ivy
- Swiss Cheese Plant

T
- Taro Vine
- Tiger Lily
- Tomato Plant
- Tree Philodendron
- Tropic Snow Dumbcane
- Tulip

V
- Variable Dieffenbachia
- Variegated Philodendron

W
- Warneckei Dracaena
- Wood Lily

Y
- Yesterday, Today, Tomorrow
- Yew (aka Japanese Yew)
- Yucca

source: www.aspca.com