.Head of Dog,.. Tooth of Cat, .Skin of a Man and Ear of an Ass.
The conversion to this spell would go something like this: -
Flower of couchgrass, leaf of catnip, frond of fern and Comfrey.

Herbal knowledge is a powerful tool. It was necessary for Witches centuries ago who possessed such knowing, to disguise the names of their ingredients so, should their sacred journal fall into the wrong hands, without the corresponding Herbal Code to decipher the true meaning of the herbal ingredients, spells, potions and medicines would be useless.

Although, herbal code names may differ, the following is an example of some common code names:

A Dead Man – Ash root, carved into a crude human shape
Adders tongue – Plantain/Dogs Tooth Violet
Adders Mouth – Stitch Wort
Bats Wing – Holly leaf
Bats Wool – Moss
Bears Ear – Auricula
Bears Foot – Stinking Hellebore
Beehive – Snail Plant
Beggars Tick – Cockhold
Birds Eye – False Hellebore
Birds tongue – European Ash
Blood – Elder sap
Bloody Fingers – Foxglove
Blue Jay – Bay laurel
Brains – Congealed gum from a cherry tree
Bulls Blood – Horehound
Bulls eyes – Marsh Marigold
Bulls Foot – Coltsfoot
Calfs Snout – Toadflax
Cat – Catnip
Catgut – Hoary Pea
Cats Eye – Star Scabious
Cats Foot – Canada Snake Root
Cats Paw – Ground Ivy
Cats Milk – Wart wort
Chicken Toe – Crawley Root
Cocks Comb – Yellow Rattle
Corpse Candles – Mullein
Cows Tail – Canada Fleabane
Crow Foot – Cranesbill
Cuckoo – Orchis, plantain
Devils Milk – Cranesbill
Dog – Couch grass
Doves Foot – Cowage Plant
Dragons Claw – Crawley Root
Dragons Scales – Bistort leaves
Ducks Foot – American Mandrake
Ear of an Ass – Comfrey
Ears of a Goat – St Johns wort
Eyes – Eyebright or daisy
Fairy Fingers/Gloves – Foxglove
Fingers – Cinquefoil
Flesh and Bone – Tormentil
Fox tale – Club Moss
Frog – Cinquefoil
Frogs Foot – Bulbous Buttercup
Goats Beard – Vegetable Oyster
Goats Foot – Clover
Hair – Maidenhair fern
Hand – The unexpanded frond from a male fern
Hawk – Hawkweed
Heart – Walnut
Horses Tail – Scouring Rush
Horses Tongue – Harts Tongue
Hounds Tongue – Vanilla leaf
Lamb – Lambs lettuce
Lambs Tongue – Ribwort Plantain
Linnet – Eyebright
Lizard – Calamint
Lions Tooth – Dandelion
Mothers Heart – Shepherds Purse
Mouse Ear – Mouse Blood Wort
Mouse Tail – Common Stonecrop
Negro Head – Vegetable Ivory
Nightingale – Hop
Old Mans Beard – Fringe Tree
Ox Tongue – Bugloss
Rabbits Foot – Field Clover
Rat – Valerian
Sheep – Dandelion
Shepherds Heart – Shepherds Purse
Skin of a Man – Fern
Skull – Skullcap
Snake – Bistort or Fennel
Snake Head – Balmony
Snake Milk – Blooming Spurge
Snakes Tongue – Adders Tongue Fern
Squirrel Ear – White Plantain
Stag Horn – Club Moss
Toad – Toadflax
Wolfs claw – Lycopodium
Wolfs foot – Bugle Weed
Toad – Sage
Tongue of Dog – Hounds tongue
Tooth or Teeth – Pinecones
Urine – Dandelion
Unicorn Horn – True Unicorn Root
Worms – Thin roots
Weasel – Rue
Woodpeckers – Peony

It was also said that when the recipe called for a certain part of something, the following section of the herb was used:

The Eye – Inner part of a blossom
The Guts – The roots and stalk
The Hair – Dried, stringy herb
The Head – The flower
The Heart – A bud, or a bit seed
The Paw, foot, leg wing, toe or scale – The leaf
The Privates – The seeds
The Tail – The stem
The Tongue – The petal
The Tooth – The leaf, seed pod

For more information on individual herbs refer to the herb section in the tools of trade menu on the site.

*Source material included:
(Minnesota: Encyclopaedia of Wicca and Witchcraft. Raven Grimassi, Llewellyn Publications 2000)

(Minnesota: Bucklands Complete Book of Witchcraft, Raymond Buckland – Llewellyn Publications 2000)