There are about 800 species in the Eucalyptus genus; correct identification can be tricky, as features may vary with genetics, environment and tree age. I’m making an educated guess* that the ones at Peter Strauss Ranch in Agoura Hills are manna/ribbon/white gums, native to south-eastern Australia.

One thing I find intriguing is the huge variation in gumnut (fruit) size from species to species, from 3mm to 60 or more mm wide. There’s no correspondence with the tree’s height; I wonder what factors determine this feature. These ones are definitely at the small end of the spectrum.

*Ref: Taller Eucalypts for Planting in Australia by Dean Nicolle