Scientific name: Fomitopsis cajanderi (Karst.) Kotl. &
Derivation of name: Fomitopsis means having the
appearance of Fomes; cajanderi indicates the species is
named for Aimo Kaarlo Cajander, a forest ecologist who
also served as Prime Minister of Finland during several
periods of his life.
Synonymy: Fomes subroseus (Weir) Overh., Trametes
subrosea Weir, Fomes cajanderi Karst.
Common names: Rosy polypore.
Occurrence on wood substrate: Saprobic; solitary to
overlapping clusters on dead conifer wood, rarely
Dimensions: Caps 2.5-10 cm wide.
Upper surface: Pinkish-red to pinkish gray-brown in age;
finely hairy to glabrous; not cracked.
Pore surface: Rose colored, becoming reddish-brown; 4-5
pores per mm.
Comments: See Bessette to distinguish from F. roseus
is more hoof-shaped, more boreal or high elevation in
distribution, and has a cracked cap surface in age. The two
species differ microscopically in spore shape. Both are
More information at RogersMushrooms.com:
Figure 1. Sessile Fomitopsis cajanderi on a log.
Photo © Tom Volk.
Figure 2. Both upper and lower surfaces have a rosy color.
Photo © Larry Grand.
Figure 3. The rosy pore surface of a freshly collected
of rosy polypore. Photo © Gary Emberger.