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This fungus looks like tiny birds' nests! Initially, they look like fluffy, yellow cushions (see 3rd picture). As they mature, they become cup-shaped, the lid disappears, and the outer surface turns brown. The fruiting body "nests" contain spore-filled periodoles ("eggs"). The nests, called peridia, serve as splash cups, and when raindrops strike the nest, the periodoles are projected into the air where they latch onto branches, leaves, etc.
Growing in mulch in a rural garden.
Spotted on Feb 20, 2018
Submitted on Feb 21, 2018
and 11 other people favorited this spotting