Let us check the possible combinations before answering the question.
Adding 木 to 木 we can get 林, however 林 is already be used to mean something else - woods.
本 means root of a tree, while 末/未 used to mean treetop. They do not refer to a tree as 朱 does.
However adding 木 to 果 (Original meaning of 果 is a fruity tree) does provide us similar meaning as 株. 棵 is the new character we would like to learn today.
As shown above, 棵 is a Chinese Classifier character, and it is a little bit different than 株.
棵 is used as counter for plants, including trees. Like: a 棵 tree.
棵 is a newly created Chinese character whose evolution history cannot be found.
Let us enjoy its Chinese calligraphy: