K+ yellow turning red
2nd photo is under UV
on bark (Prunus); underside and rhizines black; medulla white
on bark in sun; underside and rhizines black; medulla white, UV-; cortex and medulla (photo) K+ yellow; C-; KC-
Medulla pale yellow; cortex and medulla K+ yellow; underside and rhizines black
on bark; underside orange, ecorticate, with dark rhizines; cortex K+ yellow; underside K+ purple
On Pinus
on Pinus taeda