Dogwood

dogwood: reliability; durability; Christianity

Venus flytrap

venus flytrap: deception; danger

furze/gorse

furze/gorse: love; furtility

cumin

cumin: fidelity

fraxinella

fraxinella: fire; "you're not really in love"

fun fact: fraxinella is also called "gas plant" thanks to th fact that it produces an aromatic flammable vapor in hot weather. 

candytuft

candytuft/iberis: sweetness; stoic beauty; indifference

edelweiss

edelweiss: daring; courage; noble purity
fun fact: in German edelweiss means "nobel-white"