A very large hybrid, 8 meters.
Observation triptych showing trichomes. This is an observation of QB x QE, then the middle observation is QB and then an observation of QE.
Leaf morphology of the specimen is predominantly engelmannii but has some spines on the margin and trichomes are intermediate.
Joseph D. Grant County Park
All of my observations from this visit:
https://www.inaturalist.org/observations?nelat=37.37300163882107&nelng=-121.59262495061732&on=2024-07-29&order_by=observed_on&swlat=37.29793344134096&swlng=-121.7725260736642&user_id=joemdo