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.
1 Euonymus europaeus (commonly known as spindle, European spindle or spindle tree). 2  The fruit is poisonous, containing amongst other substances, the alkaloids theobromine and caffeine, as well as an extremely bitter terpene. 3  Poisonings are more common in young children, who are enticed by the brightly coloured fruits.any of the known plant defense compounds primarily defend against consumption by insects, though other animals, including humans, that consume such plants may also experience negative effects, ranging from mild discomfort to death. Many of these poisonous compounds also have important medicinal benefits.