Birdeians hard, bluish-black, at first clavate, entire, at last shrivelling some into an elongated, thickly marginated cup, continued into a stipe, the interior filled with pale colourless subgelatinous matter, in which are imbedded several series of concentric circles of dark-brown, elliptic filaments accumulated at both ends. Anidia indistinctly lobate, filled with minute dots. At the base of the stipe is some white filamentous matter. In a young and clavate state the tip of the birdeian is covered with pale subgelatinous matter. Birdeia scattered through the left of Imperatoria, and under the leaves appearing like that prepared at its tip.