I've been interested in Cotoneaster with leaves smaller than the fruits. I recently posted these photos as Cotoneaster horizontalis. But just now I saw a photo of Cotoneaster dammeri 'Tom Thumb' that looks exactly the same to me. I was going by the little prickle on the leaf tip. Maybe these leaves are too small for C. dammeri? I see that there is also C. apiculatus, which is what I'd like to call leaves with a little leaf tip prickle, and they also look the same to me in photos. It doesn't help that this page Oregon State U. page at Cotoneaster apiculatus 'Tom Thumb' | Landscape Plants | Oregon State University shows all three species that I'm mentioning here, and a few others, but calls the 'Tom Thumb' cultivar C. apiculatus. and this that I thought was the same, but maybe not. I came across the dammeri name when I was looking for the name of this, which I think is Cotoneaster microphyllus. I based that on the tiny leaves and no prickles at the leaf tips. In September, I photographed this, called it C. apiculata in my notes. Is there some visual cue to help here? Is the branch arrangement any different? One tidier than the other? C. dammeri should have the largest leaves of the ones I mentioned, at 2-3cm. But C. apiculata dimensions overlap those of C. horizontalis according to the Oregon State site.