| Kingdom | Plantae | Plants, but not fungi, lichens, or algae |
| Subkingdom | Tracheobionta | Vascular plants—plants with a “circulatory system” for delivering water and nutrients |
| Division | Magnoliophyta | Flowering plants, also known as angiosperms |
| Class | Magnoliopsida | Dicotyledons—plants with two initial seed leaves |
| Subclass | Rosidae | Roses, legumes, proteas, dogwoods, hydrangeas, mistletoes, euphorbias, grapes, many more |
| Order | Malpighiales | A broad group encompassing 16,000 species |
| Family | Euphorbiaceae | Euphorbia or spurge family |
| Genus | Euphorbia | An extremely diverse-looking genus of mostly tropical and subtropical succulent plants. For Euphorbus, corpulent Greek physician of Juba II, King of Mauretania. Literally, “euphorbia” means “well-fed” |
| Species | cyathophora | |
Euphorbia barbellata Engelm.
Euphorbia graminifolia Michx.
Euphorbia havanensis Willd. ex Boiss.
Euphorbia heterophylla L. var. barbellata (Engelm.) Holz.
Euphorbia heterophylla L. var. cyathophora (Murray) Griseb.
Euphorbia heterophylla L. var. graminifolia (Michx.) Engelm.
Poinsettia barbellata (Engelm.) Small
Poinsettia cyathophora (Murray) Klotzsch & Garcke
Poinsettia cyathophora (Murray) Klotzsch & Garcke var. graminifolia (Michx.) Mohlenbr.
Poinsettia graminifolia (Michx.) Millsp.
Poinsettia havanensis (Willd. ex Boiss.) Small
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ID is uncertain 
