Lewis's mock-range, Philadelphus lewisii

With the sun going down, I had to take a relatively long exposure which didn't help with the sharpness of this photo as there was also a small breeze that kept everything in motion.  Anyway, I have walked all over Moulton Falls Park and can only find this one mock-orange plant in the area and it is an absolute tangle of small branches growing in a steep canyon.  It is a native perennial.