Helvella compressa


Helvella compressa, also known as the compressed elfin saddle, is a species of ascomycete "sac fungus" related to the Peziza cups.

Description

The distinctive fruiting body looks roughly like a fortune cookie on a stick. The brownish cap is up to in diameter. The pale stalk is up to 10 cm long and 1.2 cm thick.

Similar species

The species can only be confused with Helvella albella, which is rarer, and has a darker brown cap and a smooth underside and H. elastica, which is smaller, with "rounder lobes". H. compressa can be distinguished from H. atra by its coloration.
Helvella compressa is genetically closely related to H. stevensii, H. corbierei, and H. levis. H. levis is more common in Europe and the Danish call it Bredsporet foldhat. Helvella stevensii is smaller and paler than H. compressa.

Distribution

Helvella compressa is endemic to North America west of the Rocky Mountains. According to David Arora, H. compressa "seems to be the most common" of the non-fluted Helvellas found in California. Helvella compressa is possibly also present in China and Tibet.