Feminine - Ruled by Jupiter - Element Water
Magical - Used by the Druids as a sacred herb against evil, balance, harmony, improves potency of love spells/majick
Mint (Spearmint and Peppermint)

Masculine - Ruled by the Mercury/Venus - Element Air
Magical - Healing, money, travel, aids digestion, calms emotions

Mugwort

Feminine - Ruled by Venus - Element Air
Magical - Psychic ability (most widely used herb by the witches), astral protection

Mullein

Masculine - Ruled by Saturn - Element Fire
Magical - Courage, protection, cleansing, purification, good substitute for graveyard dust

Myrrh

Feminine - Ruled by the Moon/Jupiter - Element Water
Magical - Purification, protection, combined with frankincense makes it more effective in these jobs

Myrtle

Feminine - Ruled by Venus - Element Water
Magical - Love, good luck, maintains youthfulness (drank in tea every third day)