<i><a href="//commons.wikimedia.org/wiki/Centaurium_exaltatum" title="Centaurium exaltatum">Centaurium exaltatum</a></i> from Joe F. Duft. USDA NRCS. 1992. Western wetland flora: Field office guide to plant species. West Region, Sacramento. Courtesy of USDA NRCS Wetland Science Institute.
Joe F. Duft
1992
<a rel="nofollow" class="external free" href="https://plants.usda.gov/java/largeImage?imageID=ceex_002_ahp.tif">http://plants.usda.gov/java/largeImage?imageID=ceex_002_ahp.tif</a>