You have to love a good disease, these trees get Nattrassia cankers that create a pretty cool looking stem. They don't seem to die, just a bit disfigured.
Misidentification: Lophostemon has similar looking leaves but not the stem. Both have nice peeling bark, but the older bark is very different and of course the flowers and fruit are very different.
Semple Ave along with Redwoods, Ca buckeye, Tan Bark Oak, Toyon tree and lots of native shrubs.
Santa Cruz - Wilder St Park