Perenniporia robiniophila

Scientific name:  Perenniporia robiniophila (Murrill)
Derivation of name:   Perenniporia means a "polypore
with perennial fruiting bodies"; robiniophila means "black
locust (Robinia) loving."
Synonymy:   Trametes robiniophila Murr.;Polyporus
(Murr.) Lloyd
Common names:  
Phylum:   Basidiomycota
Order:   Polyporales
Family:   Polyporaceae
Occurrence on wood substrate:  Parasitic; solitary or in
overlapping clusters on living deciduous trees, especially
black locust but other hardwood genera as well; year-round. 
Dimensions:  Caps 4-20 cm wide; 3.5-15 cm long; 1-5 cm
Upper surface: White, becoming smoky or yellowish on
drying; rough with warts and other protuberances.
Pore surface: White; pores 4-6 per mm.
Edibility: Inedible, unless you're a fungus beetle.
Comments: A cause of heart rot in living trees.

Figure 1. Perenniporia robiniophila on hackberry
(Celtis occidentalis) in June, 2004. See Figure 6.
Photo © Gary Emberger.

Figure 2. A closer look at some of the vertically oriented,
overlapping shelves of Perenniporia robiniophila from
Figure 1. Photo © Gary Emberger.

Figure 3. Perenniporia robiniophila on black locust
(Robinia pseudoacacia). Note the bumpy upper surface.
Photo © Gary Emberger.

Figure 4. Pleasing fungus beetles (Megalodacne sp.) doing
their thing associated with Perenniporia robiniophila on
hackberry. Photo © Gary Emberger.

Figure 5. Larvae of Pleasing fungus beetles actively feed on
the fruiting body. Their feeding holes and frass made quite a
mess of many of the conks. Photo © Gary Emberger.

Figure 6. Year after year of the fungus plundering the
wood, causing heart rot, led to this outcome in January,
2006 during a storm. This is the hackberry tree of
Figure 1. Photo © Gary Emberger.


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