Acerates viridiflora (Raf.) Britton & Brown = Asclepias viridiflora Raf.
English:
viridiflorus,-a,-um;

https://archive.org/stream/#page/14/mode/2up
homotypic synonyms:
Acerates viridiflora (Raf.) Eaton; Acerates viridiflora (Raf.) Elliott; Asclepias viridiflora Raf.; Gomphocarpus viridiflorus (Raf.) Schumann; Gomphocarpus viridiflorus (Raf.) Sprengel;

protologue: Ill. Fl. N. U.S. 3: 14 (1898)

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