Craterium minutum

Craterium minutum is a species of fungus in the Physaraceae family.
SPORANGIA: total height 0.7 to 1.5 mm., goblet-shaped, funnel-shaped, or long-cylindrical, stalked, erect, gregarious, 0.4 to 1.2 mm. high, smooth, yellow, pale brown, or brown; lid convex and above the rim of the sporangium, or flat and below it, white or concolorous; sporangial wall of two layers, the outer cartilaginous, thickened at the rim below the lid, translucent below and continued into the translucent stalk, the inner layer more or less charged with lime-granules.