I Just came across a list of toxic foods and plants for cats. (hope the Google translation went well, I don't know all these plants)
Toxic for cats:
Apricot (pit)
columbine
field horsetail
Allamanda
almonds
Aloe Vera
amaryllis
anturium
Avocado (fruit and pit)
azalea
Azalea (Japanese)
alcohol
alfalfa
Almond Kernels
Apricot
avocado
vinegar
Belladonna
Beech (nuts)
henbane
bittersweet
beer
chive
corn-cockle
beans
wood Anemone
Nux Vomica
broom
boxwood
chocolate
Christopher Herb
clematis
Clerodendrum
Clivia
mushrooms
locust
chrysanthemums
Croton
cyclamen
Dieffenbachia
darnel
Datura
marsh marigold
dracaena
grapes
Eucalyptus
spruce
holes Plant
broken heart
geranium
Wake-robin
Spotted Scheerling
yeast dough
Gloriosa
laburnum
Scots Pine
hyacinth
autumn
iris
juniper
room Brem
honeysuckle
cone Primrose
hellebore
Poinsettia
Christmas tree
chicken bones
ivy
garlic
coffee
Rape Scrap
Kroonkruid
larch
Cherry Laurel
lily
Lily of the Valley
privet
lupine
macadamia nuts
mistletoe
Maize / corn flour
ergot
marsh Horsetail
monkshood
mustard
nightshade
Narcissus
nutmeg
oleander
orange Sapling
horse chestnut
daphne
Philodendron
arrow-grass
peony
mushrooms
Propylene glycol (sometimes sits in foods like muffins or cake)
leek
rape seed meal
rhubarb
raisins
Ricinuszaden
larkspur
solomon's seal
snowdrop
Celandine
tobacco
Taxus
tea
tomato
onions
Pork (can contain deadly bacteria)
fixed Lupine
Venijnboom
Vincia
foxglove
fireworks Plant
walnuts
Wild Spindle
spurge
Cowbane
rue
wild Chestnut
wild Ragwort
salt
fir