Heliocybe sulcata

Heliocybe sulcata (Berk.) Redhead & Ginns

[on watch list for Chicago Region and Midwest]

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. Arizona and Colorado have the most specimens on MyCoPortal. Reported from Guatemala and South Africa.
Chicago Region status
Very rare. There is one photo observation from the north side of Chicago, May 2012, on Mushroom Observer 108587. There are no known collections for Illinois or Indiana.
Specimens examined

Taxon Details and Links

  • Heliocybe sulcata (Berk.) Redhead & Ginns, Trans. Mycol. Soc. Japan 26(3): 359 (1985)
  • ≡ Basionym: Lentinus sulcatus Berk., London J. Bot. 4: 301 (1845)
  • Neolentinus sulcatus (Berk.) F. Rune, Mycol. Res. 98(5): 543 (1994)
Ohio, USA. Cracks of dry, hard, fence rails.
Heliocybe is not related to Lentinus (Polyporaceae) but rather to Neolentinus and Gloeophyllum (Gloeophyllaceae).
Google Books: Mushrooms of Colorado and the Southern Rocky Mountains.
Google Books: The Essential Guide to Rocky Mountain Mushrooms by Habitat.
Chicago record on Mushroom Observer 108587
Mushroom Observer
Index Fungorum and Species Fungorum

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

Compare Index Fungorum and Mycobank.

Cite this page as: Leacock, P.R. (2018 May 07). Heliocybe sulcata - MycoGuide. Retrieved from https://mycoguide.com/guide/fungi/basi/agar/gloe/gloe/heli/sulcata

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