I first saw this Mahonia gracilipes, Chinese mahonia, at VanDusen Botanical Garden in April 2019, was taken with the new leaves and the white leaf backs. There isn't a label, but a guide showed me the name from the database. This is at a path corner under the Davidia at the beginning of the rhododendron walk. Here are photos from then. I noticed it again in February, 2021, and made a note on my photos that it blooms from August to October. Then I saw it yesterday, didn't remember the name but finally decided it looked like Mahonia, and on my way out, I noticed the flowers! They're kind of easy to miss, and hard to photograph.