First flower on my thornless boysenberry

As we near the spring equinox, it seems the plants are revving up to go into high gear. Here is the first flower on my thornless boysenberry saying hello to the early morning sun. This year, I have trellised the vines on bamboo poles, tied perpendicular to tbars which have been pounded into the ground about a foot deep. You can see a glimpse of the bamboo inthis photo.

Family: Rosaceae, Rubus urcinus