Did not know that there is now a found rose garden at Sacramento. I have not been in California for some time--but that's where I learned about roses.
For more about native California roses, see this article:
http://ucjeps.berkeley.edu/ina...
And for more about roses native to the U.S. see my article cited above.
In archaeology we often work in condemned land: beautiful farms turned into roads, reservoirs, or nuclear plants. I did have a collection of old roses salvaged from those condemned properties and daylilies, also. But, one year I lost all of my outside water, and that did in the roses. A few daylilies--not many--survived. Water can be critical.
