3. Bitter Almonds
There are two different types of almond trees. The sweet almond is where we get our almonds. The bitter almond is a very pretty tree with poisonous nuts. The nuts from the bitter almond are full of cyanide, a deadly poison.
It is illegal to buy raw, untreated bitter almonds in the US. But because they grow wild in some states and they two species look very similar, make sure you know which almond you are picking and eating!