Sarcoscypha occidentalis

Common Name: None.
Description: Cup 0.5-1.5 cm across, shallow cup-shaped; inner surface scarlet, outer surface whitish and smooth, though color on inner surface may show through. Stem 10-30 by 2 mm high and wide.
Habitat: on wet sticks and fallen branches in damp hardwood forest. Common. Found in eastern North America.
Edible: Unknown.

Source: Mushrooms of North America by Roger Phillips.