Crystal infused trees are a variant of regular trees found in Prifddinas. They can be chopped at level 1 Woodcutting to obtain regular logs. Both choppable types of tree in Prifddinas can be used to obtain a bucket of sap, by using a knife on the tree while holding a bucket in the inventory. This makes the regular trees in this city the only type of tree that doesn't have a pointy top, which is still able to produce a bucket of sap.
A variant of the huge tree with no Chop option exists next to the Dark hole in the Prifddinas Agility Course. This was the normal variety upon the release of the course, but was changed due to causing accidental misclicks when trying to enter the dark hole. The tree is otherwise identical.