Plants
There are many plants native to the planet. Because of the varying gravity depending on elevation, plants are often adapted to their environment and are not found far from their elevation of choice.
Trees
Trees are huge on this planet, often having branches that are as big as regular earth trees. There are smaller varieties of tree, but many of them can get absolutely massive. The trees in valleys are the biggest, as they need to have thick trunks to keep growing upwards.
Some trees of note:
Rainbowood Tree
A huge tree with wood speckled with various colours of the rainbow.
Redwood Tree
A very huge and very red tree
Citrusbark Tree
A tree that has wood that tastes of mild citrus.
Common Larink Tree
A common, massive tree that has branches perfect for building with.
Dentalwood Tree
This tree has wood that cleans teeth when chewed on, leaving it's sticks to be very valuable.
Rockroot Tree
A massive tree with huge roots that burrow through rock. The roots drop excess water into caves.