Handful of Summer Petals

Handfuls of Summer Petals are rewarded 10 each from the following quests during the Midsummer Fire Festival:
 * Stealing Darnassus's Flame
 * Stealing Ironforge's Flame
 * Stealing Orgrimmar's Flame
 * Stealing Silvermoon's Flame
 * Stealing Stormwind's Flame
 * Stealing the Exodar's Flame
 * Stealing the Undercity's Flame
 * Stealing Thunder Bluff's Flame

Can also be bought for from Midsummer Merchant or Midsummer Supplier in the capital cities during the Midsummer Fire Festival.