Fruiting body 1-4 cm tall, slender, upper third occupied by a fertile "head," the latter club-shaped typically compressed, smooth, sometime grooved, up to 5 mm broad, turquoise-green when fresh fading to dull green; stipe 1-1.5 mm thick, surface granular, colored like the "head" but lighter.
Spores 13-16 x 5-6 µm, elongate-elliptical, kidney-shaped, or subfusoid, not septate, hyaline, smooth, 2-4 oil droplets per spore.
Solitary to clustered in moss or duff in mixed hardwood/conifer woods; fruiting from late winter to early spring.
This diminutive earth tongue with a bright blue-green fruiting body is one of the prettiest and unmistakable of spring fungi. Only Chlorociboria aeruginascens, a relatively uncommon cup fungus, which grows on rotting wood, is similarly colored. Related earth tongues in the genera Geoglossum and Trichoglossum are easily distinguished by their blackish hue.