Scientific name: Psathyrella hydrophila (Bull.) Maire
Derivation of name: Hydr- means "water" and phil- means
"loving" or "fond of."
Synonyms: Agaricus hydrophilus Bull.
Common name(s): Clustered Psathyrella.
Occurrence on wood substrate: Saprobic; in dense cespitose
clusters on decaying deciduous stumps and logs, at the base of
trees or stumps, or on buried wood.
Dimensions: Caps 2.5-5 cm wide; stipes 2.5-15 cm long and
2-5 mm thick.
Cap: Moist; dark brownish at first, fading to honey-brown or
Gills: Attached; buff, becoming brown to purple-brown.
Spore print: Purple-brown.
Veil: Delicate, not leaving a ring.
Comments: Examine Bessette to note differences between this
species and similar P. septentrionalis.
Figure 1. Dense cespitose fruiting of Clustered Psathyrella.
Photo © Steve Nelsen.
Figure 2. Stalks of Psathyrella hydrophila are hollow and
fragile. Photo © Steve Nelsen.