"Rosemary (for Remembrance)..."

(memories of death and rebirth. love and madness. )
Ophelia distributes symbolic flowers to Claudius, Gertrude, and Laertes. Columbines were associated with marital infidelity, daisies with faithfulness, fennel with flattery, rosemary with remembrance, and rue with repentance.

"There's rosemary, that's for remembrance; pray,
love, remember: and there is pansies. that's for thoughts.
There's fennel for you, and columbines: there's rue
for you; and here's some for me: we may call it
herb-grace o' Sundays: O you must wear your rue with
a difference. There's a daisy: I would give you
some violets, but they withered all when my father
died: they say he made a good end,--"

-Ophelia, Hamlet, Act IV Scene V

painting of Ophelia, by Sir John Everett Millais.
character of Ophelia in Shakespeare's Hamlet

Rosemary has been used as a symbol for remembrance since ancient times. it appeared at various ceremonies including weddings and funerals. at weddings it was worn by newlyweds as a sign of love, fidelity, and remembrance of vows exchanged. at funerals, as remembrance of love and friendship. it has also been used to ward off evil spirits and nightmares.
Recent studies have been conducted about the carnosic acid contained in rosemary which is believed to aid in memory. (Drugs from carnosic acid are being created for Alzheimer's Disease and other neurodegenerative brain disorders)