Believe it or not…these are mugo pines! They can vary in size from 3 to 30 feet. The habit can be prostrate, rounded shrub or even pyramidal.
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