homotypic synonyms:
Aphyllon ludovicianum (Nutt.) A.Gray; Myzorrhiza ludoviciana (Nutt.) Rydb.; Orobanche ludoviciana var. multiflora (Nutt.) Beck; Orobanche ludoviciana subsp. multiflora (Nutt.) T.S. Collins ex H.L. White & W.C. Holmes; Orobanche ludoviciana Nutt.; Phelypaea ludoviciana (Nutt.) G. Don;

protologue: Repert. Bot. Syst. 3: 461 (1844)
URL protologue: https://archive.org/stream/repertoriumbotan03walp#page/461/mode/2up

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