Hydnophlebia chrysorhizon

[Phanerochaete chrysorhiza]

Spreading yellow tooth.
Epithet = golden root. Genus = toothed phlebia.
Thin effused crust, with teeth up to 1.5 mm long. Loosely attached to wood or wood debris. Color bright orange to reddish orange; teeth yellow to orange. Margin of crust noticeably fimbriate (with radiating hyphae) and with orange cords. Hyphal system monomitic; generative hyphae thin to thick-walled, usually encrusted with crystals; most septa lacking clamps. Spores narrowly ellipsoid to cylindrical, 4–6 × 2–3 μm, smooth, thin-walled, inamyloid.
Similar species
In the Midwest there are other toothed crusts but few have fimbriate (feathered) margins and cords. Etheirodon fimbriatum is pale pinkish tan, reddish-gray or violaceous. Kavinia himantia is ochre (tan) to brown with white margins and white cords. Found in the south, Hydnophlebia omnivora is yellow or cream (including spines) with a white to cream and fimbriate margin, and poorly developed cords.
Saprobe causing a white rot. Reported from hardwoods, conifers, and other dead plants. Found on underside of logs and branches.
Spring to fall.
North America (eastern USA and southeast Canada, rare southwest, likely northern Mexico), South America, Africa, Japan.
Chicago Region status
Uncommon in the region, more frequent in southern Cook County and Indiana Dunes.
Specimens examined
About 30 collections plus 30 observations for Chicago region (1994 - 2018). Four historic collections by Harper, Moffatt, and Graham.

Taxon Details and Links

  • Hydnophlebia chrysorhizon (Torr.) Parmasto, Eesti NSV Teaduste Akadeemia Toimetised 16: 384 (1967)
  • ≡ Basionym: Hydnum chrysorhizon Torr., Manual Bot., ed. 3: 309 (1822)
  • Phanerochaete chrysorhizon (Torr.) Budington & Gilb., Southwestern Naturalist 17: 417 (1973)
Lectotype - New York, USA.
This species was also placed in Oxydontia (1958), Mycoacia (1966), and Grandiniella (1977); for other synonyms see taxon links below. Ryvarden et al. (2005) state: It should be noted that the epithet chrysorhizon is a noun and indeclinable. [Should remain chrysorhizon.]
Gary Emberger
Ryvarden, L., K. Hjortstam, T. Iturriaga. 2005. Studies in corticioid fungi from Venezuela II (Basidiomycotina, Aphyllophorales). Synopsis Fungorum 20: 42–78.
Telleria, M. T., M. Dueñas, M. P. Martín. 2017. Three new species of Hydnophlebia (Polyporales, Basidiomycota) from the Macaronesian Islands MycoKeys 27: 39–64. DOI: 10.3897/mycokeys.27.14866
Mushroom Observer
MyCoPortal, H. chrysorhiza
Index Fungorum and Species Fungorum
The spelling Hydnophlebia chrysorhizon does not have a taxon number.

Cite this page as: Leacock, P.R. (2018 Sep 18). Hydnophlebia chrysorhizon - MycoGuide. Retrieved from http://www.mycoguide.com/guide/fungi/basi/agar/poly/meru/hydn/chrysorhiza

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