Here are some herbs that I found on http://www.goodreads.com/topic/show/343481-medicine-cat-s-herbs. I know more information about these and it's at the top of my 'To Do' List to update this page.
Herbs:
Poppy seeds- used to numb pain and make a cat very sleepy
Catmint - For Whitecough and Greencough. Also exceptionally tasty to cats that are not sick
Cobwebs - used to stop bleeding
Feverfew - used to cool feverish cats and treat head pain
Blackberry Leaves- Bee stings
Borage Leaves - used to treat fevers and helps nursing mothers with their milk supply
Marigold - used to treat infection and heal wounds and sores
Horse Tail - used to treat infected wounds
Burdock root - used to treat infections, especially rat bites
Chervil Root - used to treat infections
Wild Garlic - rolling in this can help to keep out infection
Coltsfoot- used to treat kittencough
Catnip(also called catmint) - used to treat whitecough and greencough; can help to relax a cat
Chickweed- used to help treat greencough
Tansy - used to treat coughs
Thyme - used to calm a cat
Chamomile - used to calm a cat
Dandelion Leaves- used to calm a cat
Juniper Berries - used to treat bellyache
Chervil- used to treat bellyache
Watermint - used to treat bellyache
Daisy Leaves - used to treat aching joints
Goldenrod- used in a poultice to treat aching joints and stiffness; can also be used for severe injuries.
Ragwort Leaves- used alongside juniper berries in a poultice to treat aching joints
Comfrey - used to treat broken bones
Nettle (leaves) - used to treat swelling
Celandine - used to treat ailments of the eyes
Snake Root - used to counter poison
Nettle (seeds) - used to counter poison
Honey - used to treat sore throats
Mouse bile - used to remove ticks from a cat's coat
Yarrow - used to make a cat vomit and expel poisons from the body
Poisons:
Deathberries - Like the name states, Deathberries will kill you if you don't eat some Yarrow soon enough
(Deadly) Nightshade - Again, it's best to eat some Yarrow if you consume one of these
Holly Berries - They sound innocent, but that's far from the truth. Eat some yarrow!
Foxglove Seeds - One word is enough. Yarrow.
