prl10188a prl10188b

Hydnophlebia chrysorhizon (Torr.) Parmasto

Eesti NSV Teaduste Akadeemia Toimetised 16: 384 (1967)

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.
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.]
Specimens examined:
About 30 collections plus 30 observations for Chicago region (1994 - 2018). Four historic collections by Harper, Moffatt, and Graham.
Description links:
Gary Emberger.
Related links:
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.
Records online:
Mushroom Observer ; iNaturalist ; MycoPortal
Taxon links:
as Hydnophlebia chrysorhiza: 332100 MycoBank ; Index Fungorum ; Species Fungorum

Note: The correct spelling Hydnophlebia chrysorhizon does not yet have a taxon number.