Tithymalus leiococcus (Engelm.) Small = Euphorbia spathulata Lam.
English:
leiococcus,-a,-um;

https://archive.org/stream/mobot31753002316567#page/721/mode/2up
homotypic synonyms:
Euphorbia dictyosperma var. leiococca Engelm.; Euphorbia leiococca (Engelm.) Norton;

protologue: Fl. S.E. U.S. : 721 (1903)

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