USDA, Natural Resources Conservations Service [USDA, NRCS]. 2015a. Native plants for national parks. Plant Materials Project Summary Reports FY 2015. Lakewood, CO: U.S. Department of Agriculture, Natural Resources Conservation Service; U.S. Department of the Interior, National Park Service: 39-41.

USDA, Natural Resources Conservations Service [USDA, NRCS]. 2015a. Native plants for national parks. Plant Materials Project Summary Reports FY 2015. Lakewood, CO: U.S. Department of Agriculture, Natural Resources Conservation Service; U.S. Department of the Interior, National Park Service: 39-41.