Same location as 2019 collection:

https://www.pnwherbaria.org/images/jpeg.php?Image=WTU-V-059507.jpg

https://www.pnwherbaria.org/images/jpeg.php?Image=WTU-V-059508.jpg

Rubus praecox vs Rubus armeniacus & R bifrons:
https://www.cal-ipc.org/wp-content/uploads/2017/10/Dispatch_2017SummerFall.pdf#page=12