The first thing Snape asks Harry is “Potter! What would I get if I added powdered root of asphodel to an infusion of wormwood?” According to Victorian Flower Language, asphodel is a type of lily meaning ‘My regrets follow you to the grave’ and wormwood means ‘absence’ and also typically symbolized bitter sorrow. If you combined that, it meant ‘I bitterly regret Lily’s death’.
until the end…
Things we lost to the flame
Things we’ll never see again
All that we’ve amassed
Sits before us, shattered into ash
And we’re looking for a page; In that lifeless book of hope; Where a dream might help you cope