Read it through once

In other natural orders we find one or two dangerous plants amongst a whole series of perfectly harmless or useful forms. The Oleander, in the Olive order, Corncockle (_Lychnis floscuculli_), in the Pink order, _Lactuca Scariola_ amongst _Compositæ_ and others are all cases in point. So also is the Yew amongst _Coniferæ_, etc.