Tree

Trees can be chopped into logs by using a hatchet. There are three sizes of trees: Small (yields 5 successful harvests), medium (yields 15 successful harvests), and large (yields 25 successful harvests). Each harvesting action yields 0-3 logs.

Cacti
Trees don't spawn in the desert, but cacti do! They can be successfully harvested for logs by using a hatchet.

Bush
Bushes yield 5 berries (right-click to harvest), and 3 successful harvests of logs.