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A plant species that occupies a large geographic range must survive in a variety of environments. Impatiens capensis, an herbaceous annual that grows contiguously from the east coast of North America to the Colorado Rocky Mountains, prefers moist environments and is easily susceptible to drought. Impatiens populations at the species' western range limit (Colorado) must endure a dramatically different environment than eastern populations do (Rhode Island and Illinois). This study investigateddoi:10.1086/657644 fatcat:pu6zwymeb5arxp42x2hvobnuhy