''Calapogon tuberosus'' var ''tuberosus'' Clarence A. Rechenthin @ USDA-NRCS PLANTS Database. Courtesy of USDA NRCS Texas State Office. From http://plants.usda.gov/cgi_bin/topics.cgi?earl=plant_profile.cgi&symbol=CATUT&photoID=capu23_004_ahp.tif {{PD-U
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