Pinus mugo subsp. rotundata 'Aries' is a dwarf, flattened bun-form of Mountain pine with shorter, gray-green needles, 0.6 - 0.8 inches (1.5 - 2 cm) long. After 10 years of growth, a mature specimen will only measure 12 inches (30 cm) tall and 16 inches (40 cm) wide, a growth rate of slightly more than 1 inch (2.5 cm) per year.
This cultivar originated as a witch's broom found in the Czech Republic long ago. It is unknown who the finder was. It is listed as #14 in the San Sebastian series of Mountain pines, a collection of 1000s of broom selections made by scores of Eastern European conifer professionals and hobbyists.
