Pinus mugo identification features are rather nondescript. A combination of features must be used. The multi-stem shrub habit is the best identification feature. Also look for the 5 plus years of needles retained on the stem creating a dense branch and the small brown cones.
Herman, D.E., et al. 1996. North Dakota tree handbook. USDA NRCS ND State Soil Conservation Committee; NDSU Extension and Western Area Power Administration, Bismarck.
Pinaceae, tree, conifer, cone, needle, evergreen, Pinus mugo, Swiss mountain pine, mugo pine