This undescribed species of Rhodocollybia  is one of the more conspicuous and
commonly encountered agarics of Montane Native Forests on all of the major
Hawaiian Islands.  It grows in leafy debris and on rotten logs of o`hia and hapu`u, and
at first glance looks a little like Rhodocollybia butyracea  (Bull.: Fr.) Lennox.  Notice,
however, the extremely crowded and narrow (-1.5 mm) lamellae that are labyrinthine
near the stipe and show a constriction a short distance from the stipe with an
elevated region internal to the constriction.  These anomalies are present in nearly
every basidiome encountered, and accordingly are diagnostic for the species.