Pancratium americanum Miller = Hymenocallis littoralis (Jacq.) Salisb.
English:
americanus,-a,-um;

https://archive.org/stream/mobot31753002894894#page/7/mode/2up
homotypic synonyms:
Hymenocallis americana (Miller) M. Roemer;

protologue: Gard. Dict., ed. 8 : 7 (1768)

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