mo-108587a mo-108587b

Heliocybe sulcata (Berk.) Redhead & Ginns

Trans. Mycol. Soc. Japan 26(3): 359 (1985)

scruffy scalycap (UK); furrowed lentinus (Lentin sillonné).
Epithet = furrowed (parallel grooves). Genus = sun-head.
Cap small, 1 to 4 cm broad; convex to flat or shallowly depressed; light to darker brown with small cinnamon to darker orange brown scales; margin developing conspicuous furrows (sulcate). Cap margin may become paler than center as cap expands. Gills fairly broad, not crowded, whitish to cream or tan; gill edges toothy (serrate). Stem 1 to 3 cm long; color paler than cap, whitish at apex, with scales becoming darker brown toward base. Flesh solid, tough, white. Spore print is white. Basidiospores 11-16 X 5-7 µm, bean-shaped, smooth, non-amyloid. Clamp connections absent.
Similar species:
Neolentinus species lack the conspicuous grooved cap margin, are generally larger, and have clamp connections. Lentinus tigrinus has a depressed cap center and lacks the grooved margin. Heliocybe has tougher flesh than similar looking gilled mushrooms such as Flammulaster, Gymnopilus, and Pholiota.
Brown rot of dead wood. Solitary to gregarious. Typically on dry wood in dry conditions, including fence posts and railroad ties. Often on aspen (Populus).
The Chicago record was in May. Generally found in the spring in the north; summer and fall in the southwest.
Widespread in United States (including Alaska, Hawaii), Canada, and Mexico. Reported from Guatemala and South Africa. Arizona and Colorado have the most specimens on MycoPortal.
Chicago Region status:
There is one photo observation from the north side of Chicago, May 2012, on Mushroom Observer. There are no known collections for Illinois or Indiana.
Ohio, USA. Cracks of dry, hard, fence rails.
Heliocybe is not related to Lentinus (Polyporaceae) but rather to Neolentinus and Gloeophyllum (Gloeophyllaceae).
Specimens examined:
Description links:
Google Books: Mushrooms of Colorado and the Southern Rocky Mountains.
Google Books: The Essential Guide to Rocky Mountain Mushrooms by Habitat.
Related links:
Chicago record on Mushroom Observer.
Records online:
Mushroom Observer ; iNaturalist ; MycoPortal
Taxon links:
104303 MycoBank ; Index Fungorum ; Species Fungorum

Note: If you find this species in Illinois or Indiana please Contact Us.