mo-108587a mo-108587b

Heliocybe sulcata (Berk.) Redhead & Ginns

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

Name:
furrowed lentinus (Lentin sillonné).
Etymology:
Epithet = furrowed (parallel grooves). Genus = sun-head.
Fruitbody:
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.
Ecology:
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).
Phenology:
The Chicago record was in May. Generally found in the spring in the north; summer and fall in the southwest.
Biogeography:
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.
Type:
Ohio, USA. Cracks of dry, hard, fence rails.
Taxonomy:
Heliocybe is not related to Lentinus (Polyporaceae) but rather to Neolentinus and Gloeophyllum (Gloeophyllaceae).
Specimens examined:
None.
Description links:
MycoQuebec.
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.
Wikipedia.
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.