A closer view of the cyathia in Euphorbia milii; each cyathium has 2 petal-like appendages. If you look closely, you can see 5 nectar glands in the center of each cyathium. Three styles and some male flowers can also be seen in the center of the cyathia.
Photo by K. R. Robertson and D. L. Nickrent of plants cultivated at the Illinois Natural History Survey.