]> A barcode-01979185 Guatemala Petén Cerro Ceibal (Chorro Ceibal or Cerro San Martín), between mouth of Río Santa Mónica and mouth of Río San Martín on left side of Río Cancuen (west side of river going downstream) Piper aequale J. Vahl J. Vahl 2019-04-29 15:02:39 J. A. Steyermark