"Euphorbia" . "Poisonous plants" . "Causes of death" . "Monotypic Asteraceae genera" . "1983 in biology" . "Eupatorieae" . "Discovery and invention controversies" . "Medicinal plants" . "Lentiviruses" . "Taxa named by Carl Linnaeus" . "IARC Group 2B carcinogens" . "Sexually transmitted diseases and infections" . "Endemic flora of Mexico" . "Triterpenes" . "Euphorbiaceae genera" . "HIV/AIDS" .