prl10188a prl10188b

Hydnophlebia chrysorhizon (Torr.) Parmasto

Eesti NSV Teaduste Akadeemia Toimetised 16: 384 (1967)

Name:
Spreading yellow tooth.
Etymology:
Epithet = golden root. Genus = toothed phlebia.
Fruitbody:
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.
Ecology:
Saprobe causing a white rot. Reported from hardwoods, conifers, and other dead plants. Found on underside of logs and branches.
Phenology:
Spring to fall.
Biogeography:
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.
Lectotype:
New York, USA.
Taxonomy:
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.