Bigpod lilac
Ceanorhus megacarpus
Several of these plants in the southeast corner of the park by Idaleona Road. No flowers yet. My iPhone (Siri Knowledge) says it is possibly ranunculus sceleratus, but I've never seen a buttercup at this park in the last 20 years I've been hiking here. Larkspur I have seen several times. Will see what happens when the flowers come up.