Roridomyces roridus

What You Should Know

Roridomyces roridus can be distinguished by its small size, grayish-white to beige-white crenulate cap and a stipe covered with a thick gel-like viscidity, often thicker at base. Habitat solitary to gregarious on twigs, branches and woody debris; fairly common throughout the wet season.

Miersch & Dänchke (2007) proposed the new species Mycena palmensis that was collected in the Canarian Island La Palma, Spain, and characterized by the almost entirely white fruitbodies and pyriform, verrucose cheilocystidia.

Rexer (1994) described another new species, R. appendiculatus.

Other names: Dripping Bonnet, Slippery Mycena.

Roridomyces roridus Mushroom Identification

1. Cap

   0.2-1 cm diameter, convex to broadly convex, often with a central depression and a straight margin that spreads and often becomes notched in age; color white to dirty yellowish; surface dry grooved when moist, but becoming even when dry.

2. Gills

   Adnate to decurrent; broad, white.

3. Stem

   1-4 cm high, very slender (~1-2 mm thick), elastic; concolorous with cap near stem apex; covered in a thick layer of clear slime that is thicker towards the base.

4. Flesh

   Thin, quite fragile; whitish.

5. Spores

   Ellipsoid, pointed at the base, amyloid, 8-12 x 4-5 µm. The basidia are 2-spored.

6. Spore Print

   White.

7. Habitat

   Gregarious on conifers debris (needles, twigs, etc.). Found in Europe and eastern and western states of North America, Australia (Grgurinovic et al., 1981), and also reported recently in China (Tolgor, 2007). April to November.

Roridomyces roridus Synonyms

1. Agaricus roridus Scop.

2. Mycena rorida (Scop.) Quél.

3. Roridella rorida (Scop.) E. Horak

Sources:

Photo 1 - Author: Nathan Wilson (Creative Commons Attribution-Share Alike 3.0 Unported)

Photo 2 - Author: Sava Krstic (sava) (Creative Commons Attribution-Share Alike 3.0 Unported)

Photo 3 - Author: Sava Krstic (sava) (Creative Commons Attribution-Share Alike 3.0 Unported)