Pinus strobiformis 'Marshall Gulch' / Marshall Gulch Southwestern White pine
Pinus strobiformis'Marshall Gulch' is a flattened-globose dwarf selection of Southwestern White pine with shaggy branch tips holding long, graceful, lush gray-green foliage. After 10 years of growth a mature specimen will grow to 4 feet (1.3 m) tall and 3 feet (1 m) wide, a rate of growth of 4 to 5 inches (10 - 12.5 cm) per year.
This cultivar originated as a witch's broom found by Dr. Frank Telewski of Michigan State University. It is named for Marshall gulch which is in Coronado National Forest, Arizona. Andy Duvall of Lyon, Michigan is credited for first propagating it and introducing it to the nursery trade in 2001.
Pinus strobiformis 'Marshall Gulch' — the original plant at Duvall Nursery, South Lyon, Michigan, 2016. It was grafted in August, 2001, from a witch's broom.
Photo by William Dunagin