Above: Siberian elm samara in New York City ... The seeds appear before the trees leaf out, so collecting a couple of handfuls is blissfully easy and does not impact developing foliage.

Groundskeepers had been noticing signs of stress and leaf loss since 2022 and implemented efforts to save the beloved elm, including increased watering and fertilization, injecting the tree with ...

Leaves are probably the most common feature used to identify trees. But in winter, when so many trees have dropped their ...