Given the stream of consciousness rationale, provide a reasonable question and answer. Rationale: The relevant information to answer the above question is: There are approximately 128 species, most of which are native to Asia, with a number also appearing in Europe, northern Africa, and North America.
The question and answer:
Acer / esr / is a genus of trees or shrubs commonly known as maple. The genus is placed in the Sapindaceae family. There are approximately 128 species, most of which are native to Asia, with a number also appearing in Europe, northern Africa, and North America. Only one species, Acer laurinum, extends to the Southern Hemisphere. The type species of the genus is the sycamore maple, Acer pseudoplatanus, the most common maple species in Europe.

Based on this passage, how many kinds of maple trees are there?
The answer is 128 species