Hello, I found these mushrooms this morning, seen in the attached photos, in a potted heather bush. They are pale yellow in color, with stalks that are 5-6 cm tall and caps (when opened like in the second photo) are 6-7 cm wide. What are they? Are they harmful to the plant? Thank you
Leucocoprinus species "Yellow Parasol" Very pretty things! see http://www.botanicalgarden.ubc.ca/forums/showthread.php?t=17336