Larix × marschlinsii 'Umhausen' is a symmetrical globose selection of Dunkeld larch with dense branching holding tiny bright-green needles that turn straw-yellow before being shed in the fall. After 10 years of growth, a mature specimen will measure 3 feet (90 cm) tall and wide, an annual growth rate of 3 to 4 inches (7.5 - 10 cm).
Despite being fairly well known in the nursery trade and present in many collections, this cultivar is of unknown origin. Umhausen is a town in the Austrian Alps and the plant's structure suggests that it is derived from a witch's broom, but none of this is confirmed.
