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Euphorbiaceae family

Euphorbia cyathophora Murray, Commentat. Soc. Regiae Sci. Gott. 7: 81, t. 1.  1786.
Syn.: Poinsettia cyathophora (Murray) Klotzsch & Garcke (1859).

Escaped very rare herb of wet or sandy open spots.
West Indies, North America, Mesoamerica, South America, exact native range obscure.
Also a cultivated ornamental.