"That's for remembering..."

A reference to Shakespeare's Hamlet:

 

OPHELIA

There's rosemary, that's for remembrance; pray,

love, remember: and there is pansies. that's for

thoughts.

Act IV, Scene 5

 

Rosemary is a herb with an old reputation for improving memory, and has long been used as a symbol for remembrance.

Find information about the history and medicinal uses of rosemary at Botanical.com.