The pineapple is an example of a multiple fruit: multiple, spirally-arranged flowers along the axis each produce a fleshy fruit that becomes pressed against the fruits of adjacent flowers, forming what appears to be a single fleshy fruit.
Should the bolded phrase be corrected as ". Each produces"?
Also, what does "the axis" refer to in this passage? (It is not mentioned before) Here's the link if it helps
http://en.wikipedia.org/wiki/Pineapple
Thanks!