Grevillea robusta

One of the most unusual trees I've seen in LA is Grevillea robusta, or Silk Oak (it is not really an oak). Several tall specimens line the edge of a ball field at Elysian Park. The flowers are amazing for their intense yellow color and intricately curving floral parts; they imparted a yellowish cast to the entire tree. This species has a very limited range in the US; apparently it can grow only in coastal and southern California and New Mexico, and southern Florida.