Amaryllis
Apple (seeds)
Apricot (pit)
Asparagus fern
Autumn crocus
Avocado (fruit & pit)
Azalea
Baby doll ti
Baby's breath
Balsam pear
Baneberry
Bean plant
Bird of paradise
Bittersweet
Black locust
Bleeding heart
Blue-green algae (some forms toxic)
Boxwood
Bracken fern
Branching ivy
Buckeye
Buckthorn
Buddhist pine
Burdock
Buttercup
Caladium
Calla lily
Castor bean (castor oil)
Ceriman
Chalice vine
Cherry tree (leaves & seeds)
China doll
Chinese evergreen
Christmas candle
Christmas rose
Chrysanthemum
Cineraria
Clematis
Coral plant
Coffee plant
Cowslip
Crown vetch
Cyclamen
Daffodil
Daisy
Daphne
 

Datura
Daylily
Deadly Amanita
Death camas
Delphinium
Dieffenbachia (dumbcane)
Devil's ivy
Elderberry
Elephant's ear
English Ivy
Eucalyptus
Euonymus
False henbane
Felt plant
Fiddle leaf fig
Fire thorn
Flamango plant
Flame tree
Foxglove
Fruit salad plant
Geranium
German Ivy
Glacier Ivy
Gladiola
Glory lily
Golden chain
Hawaiian ti
Heavenly bamboo
Heliotrope
Hemlock, poison
Hemlock, water
Henbane
Hibiscus
Holly
Honeysuckle
Horse chestnut
Hurricane plant
Hyacinth
Hydrangea
Impatient
Ivy
Jasmine
Locust tree
Lupine
Milk weed
Mountain laurel
 

Nettles
Pencil cactus
Philodendron
Pig weed
Plum (leaves & pits)
Plumosa fern
Poinsettia
Poison ivy
Pokeweed
Pothos (all kinds)
Pikeweed
Precatory bean
Primula
Privet
Purple sesbane
Raintree
Red maple
Rhododendron
Rhubarb
Ribbon plant
Rosary peas
Sandbox tree
Sago palm
Skunk cabbage
Snow drop
Snow of the mountain (ghost weed)
Sorrel
Spurges
String of pearls
Sweet pea
Taro vine
Tomato plant (green fruit, stem & leaves)
Tobacco
Tulip
Virgloia creeper
Wattle
Weeping fig
White cedar
Wisteria
Yam been
Yesterday, today & tomorrow plant
Yew (American, English & Japanese)
Yucca