Definition: "Anthraces" refers to a type of tree that grows only on one side of its trunk, forming a ring around it like an anthracite furnace. Definition: Anthracites are a unique species of trees found in the Amazon rainforest and other tropical regions. They have two main types: anthracites and arachris. Anthraces grow in dense forests where sunlight can penetrate very thinly through the canopy, allowing them to produce large amounts of lignocellulosic biomass from cellulose. However, their small size means they require a lot more space than other trees for growth.