European Alder

This is the common alder of Great Britain and central Europe southward,

growing chiefly along water courses, in boggy grounds and upon moist

mountain slopes; introduced into the United States and occasionally

escaping from cultivation; sometimes thoroughly established locally. In

Medford, Mass., there are many of these plants growing about two small

ponds and upon the neighboring lowlands, most of them small, but among

them are several trees 30-40 feet in height and 8-12 inches in diameter

at the ground, distinguishable at a glance from the shrubby native

alders by their greater size, more erect habit, and darker trunks.