Small mushroom, 1 to 2 inches across, with multiple stalks arising from a single point.  Cap color variable, from whitish to reddish brown, but usually bright yellow to greenish yellow at some stage in its life.  Stalk about an inch to 4 inches tall, yellow to yellow brown.  Gills yellow, usually greenish yellow when young (as at right), becoming purple brown (as in middle row, right) when mature and producing spores.

Grows on rotting logs and stumps and helps to rot them.  Usually fruits in the fall or in mild spells in the winter.  Found throughout North America.  The ones pictured were seen in the floodplain of Connelly's Run near the South Bridge.

The lowest images show a spore print at left, made by placing the cap, gills down, on a piece of paper overnight.  The print is purple brown, indicating the spore color.  At lowest right are spores under the microscope.  They are  oval and  about 7 micrometers (0.007 mm) across.

Sulfur tuft is poisonous, although so bitter tasting that few people are posisoned.  it is not often fatal, but it does produce severe stomach upset, accompanied by messy expulsions at both ends.