Tree guy, pretty sure those are all maple. Poplar have pinate leaves with a serated edge, the leaves in the picture appear to have 3 lobes. Also poplar bark is rather smooth, while maple species frequently develop that furrowed bark pattern when they mature. These look to be more than 50 but less than 100 years old based on diameter at breast height.
Very much not a tree guy, but its literally called poplar alley and these tree guys seep to agree with the poplar diagnosis https://www.baumkunde.de/forum/viewtopic.php?t=31139
They also make the annoying ass fluff
The bark on young trees is smooth and white to greenish or dark grey, and often has conspicuous lenticels; on old trees, it remains smooth in some species, but becomes rough and deeply fissured in others.
Learn something new every day. In America the dominant species of poplar are grandidentada (big tooth) and tremuliodes (quaking), both of which maintain smooth bark into maturity. I also learned that the crowns of those (likely black) poplars is 35m up, so we absolutely aren’t seeing leaves from the trucks pictured. The maple leaves in the picture are likely from understory saplings or sub dominant mature trees.
![[OC] alley along the danube](https://media.piefed.social/posts/Ex/nm/Exnmza5aHpwbo51.jpg){kind=link}
Tree guy, pretty sure those are all maple. Poplar have pinate leaves with a serated edge, the leaves in the picture appear to have 3 lobes. Also poplar bark is rather smooth, while maple species frequently develop that furrowed bark pattern when they mature. These look to be more than 50 but less than 100 years old based on diameter at breast height.
Very much not a tree guy, but its literally called poplar alley and these tree guys seep to agree with the poplar diagnosis https://www.baumkunde.de/forum/viewtopic.php?t=31139 They also make the annoying ass fluff
Very much not a tree guy myself tho
Learn something new every day. In America the dominant species of poplar are grandidentada (big tooth) and tremuliodes (quaking), both of which maintain smooth bark into maturity. I also learned that the crowns of those (likely black) poplars is 35m up, so we absolutely aren’t seeing leaves from the trucks pictured. The maple leaves in the picture are likely from understory saplings or sub dominant mature trees.