[2][3] Although, the caps tend to persist for multiple weeks, allowing algae to grow, giving them a slightly green appearance.

[2][3][7] C. septentrionalis is found on the trunks of living and recently deceased trees, especially beech (Fagus) and maple (Acer) species.

[2][3] Climacodon septentrionalis was the first observed species fungus not in the genus Agaricus to secrete a toxin that it uses to immobilize and kill fungiphagous nematodes.

[8][9] The mycelium of this species grows secretory cells the protrude outwards and develop branches that produce the substance in small droplets.

[8] Death after contact occurs within several hours, but the rate at which a nematode was decomposed varied greatly, ranging from a few weeks to several days.