Heliocybe sulcata (Berk.) Redhead & Ginns

[on watch list for Chicago Region and Midwest]

Name
scruffy scalycap (UK); 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. 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
None.

Taxon Details and Links

Nomenclature
  • 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)
Type
Ohio, USA. Cracks of dry, hard, fence rails.
Taxonomy
Heliocybe is not related to Lentinus (Polyporaceae) but rather to Neolentinus and Gloeophyllum (Gloeophyllaceae).
MycoQuebec.
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
Wikipedia
iNaturalist
Mushroom Observer
MyCoPortal
MycoBank
Index Fungorum and Species Fungorum

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

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

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