There are many plants toxic to cats. Below is just a few sites that list toxic plants.
http://www.aspca.org/pet-care/poison-control/plants/plant-list-cats.html
http://www.cfainc.org/articles/plants.html
http://www.sniksnak.com/plants-toxic.html
http://cats.about.com/od/catsafety/ss/toxicplants.htm
No
No the coleus leaves are not poisonous to cats.
Yes, cat plants, such as catnip and cat grass, are not poisonous to cats. In fact, they are safe and enjoyable for cats to consume.
Yes, aloe plants are toxic to cats if ingested.
Yes, cats may eat poisonous plants, which can be harmful or even fatal to them. It is important to keep toxic plants out of reach of cats to prevent accidental ingestion.
California poppies are poisonous to cats. Additional plants poisonous to cats include rhubarb, poison oak, foxtail, and the fruit salad plant.
Yes, aloe vera plants are toxic to cats if ingested.
Yes, holiday cactus plants are not considered toxic to cats.
The Tropicana plant is not poisonous to cats. However, the Stinging Nettle, Tobacco, Jimson Weed, and Lily of the Valley is poisonous.
Yes, narcissus plants are toxic to cats if ingested.
Yes, inch plants, also known as wandering jew plants, are toxic to cats if ingested.
Nasturtiums aren't poisonous for cats, so they are fine for cats to eat. There are some poisonous plants, but nasturtiums aren't one of them.