Multimedia Gallery
November 24, 2009
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A Joshua tree dusted with snow following a spring snowstorm in Tikaboo Valley, Nevada.
A Joshua tree (Yucca brevifolia) dusted with snow following a spring snowstorm in Tikaboo Valley, Nevada. Joshua trees are part of a highly specialized pollination relationship with yucca moths. In Tikaboo Valley, two species of yucca moth co-occur, and trees pollinated by each moth species are morphologically distinct.
Credit: Christopher Smith, Willamette University
Images credited to the National Science Foundation, a federal agency, are in the public domain. The images were created by employees of the United States Government as part of their official duties or prepared by contractors as "works for hire" for NSF. You may freely use NSF-credited images and, at your discretion, credit NSF with a "Courtesy: National Science Foundation" notation.
Additional information about general usage can be found in Conditions.
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