a herbaceous plant or shrub with milky latex and very small typically greenish flowers. Many kinds are cultivated as ornamentals and some are of commercial importance 大戟属植物
Genus Euphorbia, family Euphorbiaceae: numerous species 大戟属,大戟科:众多种
语源
late Middle English: shortening of Old French espurge, from espurgier, from Latin expurgare 'cleanse' (because of the purgative properties of the milky latex)