Sciadopitys verticillata 'Wintergreen' is a slow-growing pyramidal tree form of Japanese Umbrella pine with long, dark-green needles which do not turn bronze in the winter. Typical rate of growth in most areas is around 7.5 inches (20 cm) per year, resulting in a small dense tree, 6 feet (2 m) tall by 4 feet (1.3 m) wide after 10 years in the landscape.
Dr. Sidney Waxman (1923 - 2005), of the University of Connecticut, Storrs, CT is credited with the introduction of this cultivar in 1960 and its naming in 1985. It was a seedling that he selected at the college for superior winter hardiness. You can read more about Sidney Waxman's life and work at this link.
