Holly

A wand wood (Pm).

• Harry Potter had a holly wand with a phoenix feather core, eleven inches, "nice and supple," which shot red and gold sparks when Harry tried it the first time (PS5). The phoenix feather came from Dumbledore's pet, Fawkes, who also provided the core for Voldemorts yew wand (GF36).
• The combination of holly and phoenix is problematic according to Mr. Ollivander: "the wood's volatility conflicts strangely with the phoenix's detachment," however for the right owner "nothing and nobody should stand in their way"  (Pm).
• The holly wand corresponds to Harry Potter's birthday, July 31, on the list of trees assigned to the Celtic year (JKR).
• In his notes on Tales of Beedle the Bard, Dumbledore mentions an old saying: "When his wand’s oak and hers is holly, Then to marry would be folly" (TBB).

According to European tradition, the holly tree repels evil. The name "holly" is derived from the word "holy." (JKR)

In Christian symbolism, the red berries and spiky green leaves represent the blood of Jesus and the crown of thorns source: Christian Plant Symbols