Plants for caterpillars

I just read in my gardening mag an article about the importance of food plants for caterpillars, in order to protect butterflies. Some caterpillars only eat a very restricted range of plants.
There#s a list on here www.ukbutterflies.co.uk/foodplants.php.
There must be others too, as it doesn't include comfrey, which I've found has cinnabar moth caterpillars on - which I never had until I planted comfrey! So I let it get eaten.