Lamproconus undulatus (Scheidw.) Lemaire = Pitcairnia undulata Scheidw.
English:
undulatus,-a,-um;

https://archive.org/stream/#page/127/mode/2up
homotypic synonyms:
Hepetis undulata (Scheidw.) Mez; Pitcairnia undulata Scheidw.;

protologue: Jard. Fleur. 2: t. 127 (1852)

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