Lemon Grass syrup? lemon, mint leaf, grapefruit juice ....

----General Ingredients----
2 ounces white rum
1/2 ounce maraschino liqueur
1/2 ounce grapefruit juice (fresh)
3/4 ounce lime juice (fresh)
Optional: 1/4 ounce simple syrup
Garnish: lime wheel

From Hemingway Daiquiri

I thought this was very good summer cocktail. Its flavor is basically sweet and each cool and fresh ingredient makes this cocktail "Cool and Refreshing" cocktail.