If p > 0, the parabola opens to the right and if p < 0 the parabola opens to the left. The equations we have just established are known as the standard equations of a parabola. A standard equation always implies the vertex is at the origin and the focus is on one of the axes.
Euphorbias are on all the toxic plant lists and everyone is familiar with the hazards of Poinsettias.here is some discussion of severe toxic principles of Tylecodons I did not understand as these are in no way related to Euphorbias or in the Euphorbia family. Though the article is fairly long, it is filled with very few facts and is primarily anecdotal.
Derivation of name and historical aspects The family name Euphorbiaceae and genus name Euphorbia were named in honour of a Linnaean hero namely Euphorbus, first century physician to King Juba of Mauritania.He is believed to have used plants of this genus as medicine.escription The rubber-hedge euphorbia is a many-branched, succulent plant, usually 3-5 m but may reach 10 m on occasion. The bark of very old specimens is grey and rough with longitudinal dents and ridges that break up into very small fragments.