Hymenocallis portamonetensis is a bulb-forming herb in the family Amaryllidaceae.Ravenna, Pedro Felix (Pierfelice). Phytologia 57: 329 1985. It is native to the State of Chiapas in southern Mexico.Kew World Checklist of Selected Plant FamiliesEspejo Serena, A. & López-Ferrari, A.R. (1993). Las Monocotiledóneas Mexicanas una Sinopsis Florística 1(1): 1-76. Consejo Nacional de la Flora de México, México D.F. The epithet refers to the type locale, along the Río Puerta Moneda in Chiapas.

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