Butyriboletus frostii
See Boletus frostii at
Macrofungi of Costa Rica
This Bolete mushroom is associated with oak trees; mid to late summer.  
Olive brown spore print. Exudes a clear yellow liquid when young and fresh.
Deep, soft reticulation covers the stem. Vivid colors of red, yellow and
orange. One of the most visually fascinating mushrooms out there.
Boletus
frostii
and Exsudoporus frostii are synonyms.
Exsudoporus frostii
Exsudoporus frostii
Exsudoporus frostii
Exsudoporus frostii
Exsudoporus frostii
Exsudoporus frostii