The best known poisonous plant/tree in Australia would have to be the Oleander which is considered both a tree and a shrub (large). The sap in the shoots and leaves of this plant is highly toxic and poisonous to both animals and humans. The dangers to one's own children probably make this plant best cleared completely from farm paddocks and house yard and domestic gardens

its dramatically poetic. there are many friendly trees. have you ever seen trees that are not green....i would like to show you some....(i m talking true, some exist which their predominant color is not green)

Two things: 1. Who thought that? "I thought a poisonous tree..." "She thought a poisonous tree.." 2. No need for "it" in the same sentence. We already have "poisonous tree". "A poisonous tree should be green." ---> "I thought / a poisonous tree should be green".

yes it should be green.