I have a few of these plants growing in my garden along a trelace fence in the south of the UK. Although I've seen them in my local area grown as more of a mounded shrub.
As you can see, the individual branches grow in long thin cane like structures with no discerning taper along their length.
I've never seen it flower or fruit, but it is usually kept trimmed and it seems to train itself up the trelace.