The appearance of 'unusual' and 'common' next to each other in the title is a very rare occurance in itself.
Abscess Root
Adder's Tongue
Bedstraw
Bittersweet
Compass Plant
Devil's Bit
Dyer's Madder
Eyebright
Feverfew
Forget-Me-Not
Goat's Beard
Horehound
Horsetails
Jacob's Ladder
Jewelwood
John's Bread
Love Lies Bleeding
Mouse Ear
Paradise Gains
Queen's Delight
Shepherd's Purse
Snapdragon
lalia
Do you know of any common uses for these common plants with not-so-common names?