The fruit of a very tart species of guava. This is especially good as a fruit drink. Often the locals mix some sugar into it.
References
http://ilikerareplants.blogspot.com/2009/02/costa-rican-guava-psidium.html
http://www.hort.purdue.edu/newcrop/morton/costa_rican_guava.html
Tags
native, fruit,