Cephalocereus royenii (L.) Britton & Rose
      
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2 222765 Cephalocereus royenii (L.) Britton & Rose [80 171974 Cactus royenii L.] Cactaceae
N.L. Britton, F.W. Horne, Popular Fl. Puerto Rico: t. 109] () [F.W. Horne]