Alnus latior Sap.
Leaf with rather long petiole. Broadly oval, widest point mostly above
the middle. Leaf rounded or acuminate at the top. Border with some, small
teeth. Teeth regular but short.
Main vein strong; secundary veins at rather a large angle with the main vein. Near the border somewhat bent upwards and sometimes connected by arches. About 12 pairs of side veins.
I couldn't find the name A. latior in other papers, so it is perhaps better to use the name Alnus sp.